The number of electrons in each element’s electron shells, particularly the outermost valence shell, is the primary factor in determining its chemical bonding behavior. Pure radium is silvery-white alkaline earth metal. is a rare earth element with a metallic silver luster. Formula weight or, molecular weight or molar mass is what you need. Its boiling point is the lowest among all the elements. At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. What is the average atomic mass of this element? If you want to get in touch with us, please do not hesitate to contact us via e-mail: Discoverer: Ramsey, Sir William and Cleve, Per Teodor. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. Platinum is a dense, malleable, ductile, highly unreactive, precious, silverish-white transition metal. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. 30.974 is incorrect. Discoverer: Priestley, Joseph and Scheele, Carl Wilhelm, Discoverer: Ramsay, William and Travers, Morris, Discoverer: Ramsay, Sir William and Strutt, John (Lord Rayleigh), Discoverer: Del Rio, Andrés Manuel (1801) and Sefström, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Émile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and Segrè, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: Müller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. The chemical symbol for Actinium is Ac. It is the heaviest element that can be formed by neutron bombardment of lighter elements, and hence the last element that can be prepared in macroscopic quantities. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. Atomic mass of Phosphorus is 30.9738 u. The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. The standard SI unit is kilograms per cubic meter (kg/m3). Aluminium is a silvery-white, soft, nonmagnetic, ductile metal in the boron group. The part of the atom where the electrons CANNOT be found is the. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. Silicon is a chemical element with atomic number 14 which means there are 14 protons and 14 electrons in the atomic structure. It occurs on Earth as the decay product of various heavier elements. The information contained in this website is for general information purposes only. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Oxygen is a colourless, odourless reactive gas, the chemical element of atomic number 8 and the life-supporting component of the air. Its extreme rarity in the Earth’s crust, comparable to that of platinum. The chemical symbol for Fluorine is F. Fluorine is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. Therefore, we cannot determine the neutron number of uranium, for example. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Zirconium is widely used as a cladding for nuclear reactor fuels. The chemical symbol for Radium is Ra. The volume of an atom is about 15 orders of magnitude larger than the volume of a nucleus. Anyone can be able to come here, learn the basics of materials science, material properties and to compare these properties. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). The chemical symbol for Californium is Cf. Phosphorus vapor just above its boiling point of 280.5°C consists of tetratomic molecules in a tetrahedral form in contrast to its higher temperature form with is diatomic and similar to the nitrogen diatomic form. Ytterbium is a chemical element with atomic number 70 which means there are 70 protons and 70 electrons in the atomic structure. Feel free to ask a question, leave feedback or take a look at one of our articles. Tellurium is a chemical element with atomic number 52 which means there are 52 protons and 52 electrons in the atomic structure. By mass, oxygen is the third-most abundant element in the universe, after hydrogen and helium. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. All of its isotopes are radioactive. Francium is an alkali metal, that has one valence electron. Silicon – Periodic Table – Atomic Number – Mass – Radius – Density, Chlorine – Periodic Table – Atomic Number – Mass – Radius – Density. These elements, along with the chemically similar elements scandium and yttrium, are often collectively known as the rare earth elements. Actinium is a chemical element with atomic number 89 which means there are 89 protons and 89 electrons in the atomic structure. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. The chemical symbol for Sulfur is S. Sulfur is abundant, multivalent, and nonmetallic. For the phosphate anion PO43- 95g per mole for the molar mass. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. The chemical symbol for Mercury is Hg. Sodium is an alkali metal, being in group 1 of the periodic table, because it has a single electron in its outer shell that it readily donates, creating a positively charged atom—the Na+ cation. Density: 1.82 grams per cubic centimeter 5. But this “huge” space is occupied primarily by electrons, because the nucleus occupies only about 1721×10−45 m3 of space. Other countries or reg… Cerium is the second element in the lanthanide series. Because of its high chemical reactivity, barium is never found in nature as a free element.  The density of Hassium results from its high atomic weight and from the significant decrease in ionic radii of the elements in the lanthanide series, known as lanthanide and actinide contraction. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. The chemical symbol for Molybdenum is Mo. A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. It has an estimated density of 40.7 x 103 kg/m3. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. Tin is a chemical element with atomic number 50 which means there are 50 protons and 50 electrons in the atomic structure. The chemical symbol for Manganese is Mn. Numbe… E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. It is the 6thmost abundant element in the living systems. It is a lanthanide, a rare earth element, originally found in the gadolinite mine in Ytterby in Sweden. If you want to get in touch with us, please do not hesitate to contact us via e-mail: Copyright 2020 Periodic Table | All Rights Reserved |. Krypton is a chemical element with atomic number 36 which means there are 36 protons and 36 electrons in the atomic structure. The chemical symbol for Tungsten is W. Tungsten is a rare metal found naturally on Earth almost exclusively in chemical compounds. Caesium has physical and chemical properties similar to those of rubidium and potassium. The chemical symbol for Selenium is Se. Its density is about 70% higher than that of lead, and slightly lower than that of gold or tungsten. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Hassium is a chemical element with symbol Hs and atomic number 108. In nuclear industry boron is commonly used as a neutron absorber due to the high neutron cross-section of isotope 10B. The chemical symbol for Thorium is Th. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. Phase at room temperature: Solid 6. Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The chemical symbol for Tellurium is Te. The chemical symbol for Zirconium is Zr. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. Mass numbers of typical isotopes of Phosphorus are 31. Since the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance, it is obvious, the density of a substance strongly depends on its atomic mass and also on the atomic number density (N; atoms/cm3). The chemical symbol for Helium is He. The chemical symbol for Niobium is Nb. The atomic radius of Phosphorus atom is 107pm (covalent radius). The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer (passivation) stabilizes the free metal somewhat against further oxidation. Francium is the second-least electronegative element, behind only caesium, and is the second rarest naturally occurring element (after astatine). Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. The standard SI unit is kilograms per cubic meter (kg/m3). The unit of measure for mass is the atomic mass unit (amu). Atomic mass of Phosphorus is 30.9738 u.. Lawrencium is a chemical element with atomic number 103 which means there are 103 protons and 103 electrons in the atomic structure. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. If we include man made elements, the densest so far is Hassium. Hassium is a chemical element with symbol Hs and atomic number 108. The chemical symbol for Erbium is Er. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Therefore, the effective nuclear charge towards the outermost electrons increases, drawing the outermost electrons closer. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. It is also sometimes considered the first element of the 6th-period transition metals and is traditionally counted among the rare earth elements. The chemical symbol for Lutetium is Lu. Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. Caesium is a soft, silvery-gold alkali metal with a melting point of 28.5 °C, which makes it one of only five elemental metals that are liquid at or near room temperature. The chemical symbol for Lead is Pb. The chemical symbol for Tin is Sn. It has an atomic mass of 10 daltons. Iodine is the least abundant of the stable halogens, being the sixty-first most abundant element. It is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas, the first in the noble gas group in the periodic table. The chemical symbol for Sodium is Na. ChEBI Phosphorus P-32 is a radioactive isotope of phosphorus with beta particle-emitting radiocytotoxic activity. The chemical symbol for Uranium is U. In a neutral atom there are as many electrons as protons moving about nucleus. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance. Thorium is moderately hard, malleable, and has a high melting point. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). In minerals, phosphorus generally occurs as phosphate. Phosphorus. On the atomic scale, physicists have found that quantum mechanics describes things very well on that scale. The chemical symbol for Yttrium is Y. Yttrium is a silvery-metallic transition metal chemically similar to the lanthanides and has often been classified as a “rare-earth element”. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. Rising temperatures make the liquid expand in a liquid-in-tube thermometer and bend bimetallic strips. Lawrencium is the final member of the actinide series. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Radon is a radioactive, colorless, odorless, tasteless noble gas. Silicon is a hard and brittle crystalline solid with a blue-grey metallic lustre, it is a tetravalent metalloid and semiconductor. Polonium is a chemical element with atomic number 84 which means there are 84 protons and 84 electrons in the atomic structure. Neptunium is the first transuranic element. A major development was the discovery that steel could be made highly resistant to corrosion and discoloration by adding metallic chromium to form stainless steel. Thallium is a soft gray post-transition metal is not found free in nature. The difference is a measure of the nuclear binding energy which holds the nucleus together. It is the heaviest essential mineral nutrient. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant. The chemical symbol for Neon is Ne. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. It is the 12 th most abundant element in Earth’s crust. Tantalum is a rare, hard, blue-gray, lustrous transition metal that is highly corrosion-resistant. We assume no responsibility for consequences which may arise from the use of information from this website. Cadmium is a chemical element with atomic number 48 which means there are 48 protons and 48 electrons in the atomic structure. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. The chemical symbol for Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Arsenic, Antimony, Bismuth and Moscovium are the other elements in the nitrogen family. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. The chemical symbol for Zinc is Zn. Chlorine is a yellow-green gas at room temperature. As a result of this expansion, the density of most materials decreases. The chemical symbol for Nobelium is No. Iron is a chemical element with atomic number 26 which means there are 26 protons and 26 electrons in the atomic structure. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Gold is a transition metal and a group 11 element. Cobalt is a chemical element with atomic number 27 which means there are 27 protons and 27 electrons in the atomic structure. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. It is the eponym of the lanthanide series, a group of 15 similar elements between lanthanum and lutetium in the periodic table, of which lanthanum is the first and the prototype. ›› Phosphorus molecular weight. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. The chemical symbol for Iodine is I. Iodine is the heaviest of the stable halogens, it exists as a lustrous, purple-black metallic solid at standard conditions that sublimes readily to form a violet gas. The chemical symbol for Arsenic is As. In nuclear industry, especially artificial xenon 135 has a tremendous impact on the operation of a nuclear reactor. The size and mass of atoms are so small that the use of normal measuring units, while possible, is often inconvenient. Although classified as a rare earth element, samarium is the 40th most abundant element in the Earth’s crust and is more common than such metals as tin. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Atomic weight (average mass of the atom): 30.973762 4. The chemical symbol for Scandium is Sc. Carbon is one of the few elements known since antiquity. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Phosphorus has 15 protons and electrons in its structure. and Gay-Lussac, L.-J. All of the alkali metals have a single valence electron in the outer electron shell, which is easily removed to create an ion with a positive charge – a cation, which combines with anions to form salts. The chemical symbol for Praseodymium is Pr. The atomic radius of a chemical element is a measure of the distance out to which the electron cloud extends from the nucleus. The chemical symbol for Nickel is Ni. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. Holmium is a relatively soft and malleable silvery-white metal. Atomic Number of Phosphorus. Hafnium’s large neutron capture cross-section makes it a good material for neutron absorption in control rods in nuclear power plants, but at the same time requires that it be removed from the neutron-transparent corrosion-resistant zirconium alloys used in nuclear reactors. The nucleus is composed of protons and neutrons. Despite its high price and rarity, thulium is used as the radiation source in portable X-ray devices. The chemical symbol for Gold is Au. But its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. Melting point: 111.57 degrees Fahrenheit (44.15 degrees Celsius) 7. It has an estimated density of 40.7 x 103 kg/m3. The chemical symbol for Chlorine is Cl. Manganese is a metal with important industrial metal alloy uses, particularly in stainless steels. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? 1) You may use almost everything for non-commercial and educational use. The atomic mass or relative isotopic mass refers to the mass of a single particle, and therefore is tied to a certain specific isotope of an element. Its physical and chemical properties are most similar to its heavier homologues strontium and barium. Phosphorus occurs in many isotopic forms. Phosphorus is a low melting-point non-metal which occurs in several forms. The most common source of phosphorus is calcium phosphate that is present in rocks. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. The atomic mass is the mass of an atom. Iridium is a very hard, brittle, silvery-white transition metal of the platinum group, iridium is generally credited with being the second densest element (after osmium). The name xenon for this gas comes from the Greek word ξένον [xenon], neuter singular form of ξένος [xenos], meaning ‘foreign(er)’, ‘strange(r)’, or ‘guest’. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Note that, it was found the rest mass of an atomic nucleus is measurably smaller than the sum of the rest masses of its constituent protons, neutrons and electrons. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. It readily forms hard, stable carbides in alloys, and for this reason most of world production of the element (about 80%) is used in steel alloys, including high-strength alloys and superalloys. It is by mass the most common element on Earth, forming much of Earth’s outer and inner core. Aluminum is a chemical element with atomic number 13 which means there are 13 protons and 13 electrons in the atomic structure. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. Therefore the space in an atom (between electrons and an atomic nucleus) is not empty, but it is filled by a probability density function of electrons (usually known as  “electron cloud“). Atomic Number of Phosphorus. It is fairly soft and slowly tarnishes in air. The chemical symbol for Fermium is Fm. The atomic mass of phosphorus is 30.973762 u. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Chemically, indium is similar to gallium and thallium. Elemental phosphorus exists in two major forms, white phosphorus and red phosphorus, but because it is highly reactive, phosphorus is never found as a free element on Earth. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. Neodymium is a soft silvery metal that tarnishes in air. The largest natural reserves of phosphorus are present in Arab region. The Van der Waals radius, rw, of an atom is the radius of an imaginary hard sphere representing the distance of closest approach for another atom. The chemical symbol for Radon is Rn. Atomic mass is defined as the number of protons and neutrons in an atom where the mass of each proton and neutron is approximately 1 amu … Argon is mostly used as an inert shielding gas in welding and other high-temperature industrial processes where ordinarily unreactive substances become reactive; for example, an argon atmosphere is used in graphite electric furnaces to prevent the graphite from burning. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. Since the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance, it is obvious, the density of a substance strongly depends on its atomic mass and also on the atomic number density (N; atoms/cm3). The configuration of these electrons follows from the principles of quantum mechanics. Exposure to white phosphorus should not exceed 0.1 mg/m 3 (8-hour time-weighted average per 40-hour work week). A freshly exposed surface of pure copper has a reddish-orange color. For 12C the atomic mass is exactly 12u, since the atomic mass unit is defined from it. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. Francium is a chemical element with atomic number 87 which means there are 87 protons and 87 electrons in the atomic structure. Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z. The correct answer is option A If Phosphorous has an atomic mass of 30 and 15 neutrons the proton number is most likely 15. The chemical symbol for Tantalum is Ta. The chemical symbol for Strontium is Sr. Strontium is an alkaline earth metal, strontium is a soft silver-white yellowish metallic element that is highly reactive chemically. The chemical symbol for Curium is Cm. The chemical symbol for Neptunium is Np. This variation is typically small for solids and liquids but much greater for gases. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity, behind only oxygen and fluorine. Mendelevium is a metallic radioactive transuranic element in the actinide series, it is the first element that currently cannot be produced in macroscopic quantities. The chemical symbol for Xenon is Xe. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. Isotope Mass (amu) Percent Abundance Phosphorus-29 29 5% Phosphorus-31 31 71% Phosphorus-32 32 24%. Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. Phosphorus is the second element in the fifteenth column of the period table. The chemical symbol for Antimony is Sb. The only naturally occurring isotope of phosphorus is that of mass 31. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. Holmium is a part of the lanthanide series, holmium is a rare-earth element. The density of Hassium results from its high atomic weight and from the significant decrease in ionic radii of the elements in the lanthanide series, known as lanthanide and actinide contraction. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Note that, it was found the rest mass of an atomic nucleus is measurably smaller than the sum of the rest masses of its constituent protons, neutrons and electrons. Erbium is a chemical element with atomic number 68 which means there are 68 protons and 68 electrons in the atomic structure. 1) You may use almost everything for non-commercial and educational use. The size and mass of atoms are so small that the use of normal measuring units, while possible, is often inconvenient. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 electrons in the atomic structure. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). Xenon is a colorless, dense, odorless noble gas found in the Earth’s atmosphere in trace amounts. (1969), Discoverer: Scientists at Dubna, Russia (1967)/Lawrence Berkeley Laboratory (1970), Discoverer: Armbruster, Paula and Muenzenberg, Dr. Gottfried, Element Category: unknown, probably a transition metal, Discoverer: David Anderson, Ruhani Rabin, Team Updraft, Element Category: unknown, probably a post-transition metal, Discoverer: Hisinger, Wilhelm and Berzelius, Jöns Jacob/Klaproth, Martin Heinrich. Argon is a chemical element with atomic number 18 which means there are 18 protons and 18 electrons in the atomic structure. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. For other isotopes, the isotopic mass usually differs and is usually within 0.1 u of the mass number. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. Due to the quantum nature of electrons, the electrons are not point particles, they are smeared out over the whole atom. Promethium is one of only two such elements that are followed in the periodic table by elements with stable forms. The chemical symbol for Oxygen is O. The atomic mass of an element is determined by the total mass of neutrons and protons that can be found in a single atom belonging to this element. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Thorium is a chemical element with atomic number 90 which means there are 90 protons and 90 electrons in the atomic structure. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. The chemical symbol for Bismuth is Bi. Neodymium is not found naturally in metallic form or unmixed with other lanthanides, and it is usually refined for general use. It is the fifth most abundant element in Earth’s crust and the third most abundant metal, after iron and aluminium. Atomic mass of Phosphorus is 30.9738 u. www.nuclear-power.net. Typical densities of various substances are at atmospheric pressure. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Arsenic is a metalloid. Molar mass of P = 30.973761 g/mol. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. Atomic Mass of Phosphorus. Americium is a transuranic member of the actinide series, in the periodic table located under the lanthanide element europium, and thus by analogy was named after the Americas. The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. Very soft and malleable, indium has a melting point higher than sodium and gallium, but lower than lithium and tin. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. Atomic symbol (on the Periodic Table of Elements): P 3. The difference is a measure of the nuclear binding energy which holds the nucleus together. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. The chemical symbol for Magnesium is Mg. Magnesium is a shiny gray solid which bears a close physical resemblance to the other five elements in the second column (group 2, or alkaline earth metals) of the periodic table: all group 2 elements have the same electron configuration in the outer electron shell and a similar crystal structure. The chemical symbol for Einsteinium is Es. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. If you continue to use this site we will assume that you are happy with it. 113Cd has specific absorption cross-section. In words, the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance. The name samarium is after the mineral samarskite from which it was isolated. As a result, the electron cloud contracts and the atomic radius decreases. The chemical symbol for Boron is B. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. The chemical symbol for Holmium is Ho. The information contained in this website is for general information purposes only. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. The unit of measure for mass is the atomic mass unit (amu) . Relative atomic mass: 30.973 761 998(5) Phosphorus was discovered by Hennig Brandt (DE) in 1669. It's Toxic by inhalation, ingestion, or skin contact. We assume no responsibility for consequences which may arise from the use of information from this website. Technetium is a chemical element with atomic number 43 which means there are 43 protons and 43 electrons in the atomic structure. Lanthanum is a chemical element with atomic number 57 which means there are 57 protons and 57 electrons in the atomic structure. 31.14 amu. The chemical symbol for Cerium is Ce. The chemical symbol for Europium is Eu. Our Website follows all legal requirements to protect your privacy. These electrons together weigh only a fraction (let say 0.05%) of entire atom. Since nucleons (protons and neutrons) make up most of the mass of ordinary atoms, the density of normal matter tends to be limited by how closely we can pack these nucleons and depends on the internal atomic structure of a substance. It is the fourth most common element in the Earth’s crust. The chemical symbol for Carbon is C. It is nonmetallic and tetravalent—making four electrons available to form covalent chemical bonds. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Nickel is a silvery-white lustrous metal with a slight golden tinge. It is classified as a nonmetal.Phosphorus atoms have 15 electrons and 15 protons with 5 … Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. The ninth member of the lanthanide series, terbium is a fairly electropositive metal that reacts with water, evolving hydrogen gas. As for the position where to find phosphorus in the periodic table of the elements, phosphorus is in group 15 and period 3. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. This is often expressed as a decimal number on the periodic table. Lanthanoids comprise the 15 metallic chemical elements with atomic numbers 57 through 71, from lanthanum through lutetium. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? It is an intensive property, which is mathematically defined as mass divided by volume: In words, the density (ρ) of a substance is the total mass (m) of that substance divided by the total volume (V) occupied by that substance. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. The chemical symbol for Promethium is Pm. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. The chemical symbol for Gadolinium is Gd. Boiling point: 536.9 F (280.5 C) 8. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Nearly all technetium is produced synthetically, and only minute amounts are found in the Earth’s crust. Californium is a chemical element with atomic number 98 which means there are 98 protons and 98 electrons in the atomic structure. The chemical symbol for Phosphorus is P.. Atomic Mass of Phosphorus. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. For example, 63Cu (29 protons and 34 neutrons) has a mass number of 63 and an isotopic mass in its nuclear ground state is 62.91367 u. The chemical symbol for Thulium is Tm. 30.974 is the molar mass of phosphorus. Vanadium is a chemical element with atomic number 23 which means there are 23 protons and 23 electrons in the atomic structure. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. The chemical symbol for Silver is Ag. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. The density of a material varies with temperature and pressure. Atomic number of Phosphorus is 15 and it is indicated by the symbol is P. P belongs to the nitrogen family. See also: Atomic Number – Does it conserve in a nuclear reaction? Polonium is a rare and highly radioactive metal with no stable isotopes, polonium is chemically similar to selenium and tellurium, though its metallic character resembles that of its horizontal neighbors in the periodic table: thallium, lead, and bismuth. Major advantage of lead shield is in its compactness due to its higher density. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. Gadolinium is a chemical element with atomic number 64 which means there are 64 protons and 64 electrons in the atomic structure. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. Francium is a highly radioactive metal that decays into astatine, radium, and radon. These condensers use tubes that are usually made of stainless steel, copper alloys, or titanium depending on several selection criteria (such as thermal conductivity or corrosion resistance). The chemical symbol for Polonium is Po. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. It is a synthetic element (first synthesised at Hasse in Germany) and radioactive. Berkelium is a member of the actinide and transuranium element series. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula. Lutetium is a chemical element with atomic number 71 which means there are 71 protons and 71 electrons in the atomic structure. Platinum is one of the least reactive metals. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. The total number of neutrons in the nucleus of … The Cookies Statement is part of our Privacy Policy. Atomic mass of Phosphorus is 30.9738 u. In nuclear reactors, promethium equilibrium exists in power operation. What is the ground-state … Copernicium - Atomic Mass - Atomic Weight - Cn, What is Atomic Mass - Isotopic Mass - Definition, Arsenic - Atomic Mass - Atomic Weight - As, Actinium - Atomic Mass - Atomic Weight - Ac, Polonium - Atomic Mass - Atomic Weight - Po, Silicon – Atomic Mass – Atomic Weight – Si. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. The term atomic mass isn’t relevant to polyatomic species. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. The atomic mass is carried by the atomic nucleus, which occupies only about 10-12 of the total volume of the atom or less, but it contains all the positive charge and at least 99.95% of the total mass of the atom. The chemical symbol for Osmium is Os. Tin is a post-transition metal in group 14 of the periodic table. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Masses and abundance of isotopes are used in calculation. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium. It is even less abundant than the so-called rare earths. Our Website follows all legal requirements to protect your privacy. As an element, phosphorus exists in two major forms—white phosphorus and red phosphorus—but because it is highly reactive, phosphorus is never found as a free element on Earth. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. Technetium is the lightest element whose isotopes are all radioactive; none are stable. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. Osmium is a hard, brittle, bluish-white transition metal in the platinum group that is found as a trace element in alloys, mostly in platinum ores. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure.The chemical symbol for Phosphorus is P. Atomic Mass of Phosphorus. It may seem, that the space and in fact the matter is empty, but it is not. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. We use cookies to ensure that we give you the best experience on our website. It explains how we use cookies (and other locally stored data technologies), how third-party cookies are used on our Website, and how you can manage your cookie options. The chemical symbol for Mendelevium is Md. Although neodymium is classed as a rare earth, it is a fairly common element. One unified atomic mass unit is approximately the mass of one nucleon (either a single proton or neutron) and is numerically equivalent to 1 g/mol. thus 1 mole of phosphorus has 30.974 grams, but there are 6.022 x 10^-23 atoms in one mole. Typical densities of various substances are at atmospheric pressure. Elemental sulfur is a bright yellow crystalline solid at room temperature. The densest material found on earth is the metal osmium, but its density pales by comparison to the densities of exotic astronomical objects such as white dwarf stars and neutron stars. 2) You may not distribute or commercially exploit the content, especially on another website. The chemical symbol for Caesium is Cs. Atomic Number of Phosphorus. We can determine the neutron number of certain isotope. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. Since nucleons (protons and neutrons) make up most of the mass of ordinary atoms, the density of normal matter tends to be limited by how closely we can pack these nucleons and depends on the internal atomic structure of a substance. Atomic number (number of protons in the nucleus): 15 2. Phosphorus is a chemical element with the symbol P and atomic number 15. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. The Cookies Statement is part of our Privacy Policy. Barium is the fifth element in group 2 and is a soft, silvery alkaline earth metal. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. The chemical symbol for Thallium is Tl. The chemical symbol for Germanium is Ge. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Titanium can be used in surface condensers. On the periodic table of the elements, atomic radius tends to increase when moving down columns, but decrease when moving across rows (left to right). The chemical symbol for Argon is Ar. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. The chemical symbol for Ytterbium is Yb. In fact their absorption cross-sections are the highest among all stable isotopes. The other isotopes from mass 24 to mass 46 have been synthesized by appropriate nuclear reactions.All of these are radioactive with relatively short half-lives. Increasing the pressure on an material (especially for liquids or gases) decreases the volume of the object and thus increases its density via the atomic number density. Compressibility (also known as the coefficient of compressibility is a measure of the relative volume change of a fluid or solid as a response to a pressure (or mean stress) change. Fermium is a member of the actinide series. 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