The chemical symbol for Hafnium is Hf. Uranium has the highest atomic weight of the primordially occurring elements. White phosphorous, red phosphorus and black phosphorus are three allotropes of phosphorous. The chemical symbol for Phosphorus is P. Atomic mass of Phosphorus is 30.9738 u.Â. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. The chemical symbol for Technetium is Tc. The chemical symbol for Nickel is Ni. Tellurium is a brittle, mildly toxic, rare, silver-white metalloid. The atomic mass is the mass of an atom. 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. Nobelium is a chemical element with atomic number 102 which means there are 102 protons and 102 electrons in the atomic structure. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. It's Toxic by inhalation, ingestion, or skin contact. The chemical symbol for Mendelevium is Md. As a result of this expansion, the density of most materials decreases. It occurs on Earth as the decay product of various heavier elements. For uranium atom, the Van der Waals radius is about 186 pm = 1.86 ×10−10m. Atomic number (number of protons in the nucleus): 15 2. Typical densities of various substances are at atmospheric pressure. The chemical symbol for Chromium is Cr. These have similar chemical properties, but palladium has the lowest melting point and is the least dense of them. 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 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. 1) You may use almost everything for non-commercial and educational use.  It is a synthetic element (first synthesised at Hasse in Germany) and radioactive. 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. Commercially, thallium is produced as a byproduct from refining of heavy metal sulfide ores. The chemical symbol for Chlorine is Cl. The chemical symbol for Caesium is Cs. Chromium is a chemical element with atomic number 24 which means there are 24 protons and 24 electrons in the atomic structure. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Chlorine is a yellow-green gas at room temperature. Cerium is the second element in the lanthanide series. Tellurium is chemically related to selenium and sulfur. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. The chemical symbol for Praseodymium is Pr. Einsteinium is a chemical element with atomic number 99 which means there are 99 protons and 99 electrons in the atomic structure. The chemical symbol for Rhenium is Re. Pure radium is silvery-white alkaline earth metal. Relative atomic mass: 30.973 761 998(5) Phosphorus was discovered by Hennig Brandt (DE) in 1669. Its extreme rarity in the Earth’s crust, comparable to that of platinum. Technetium is the lightest element whose isotopes are all radioactive; none are stable. The difference is a measure of the nuclear binding energy which holds the nucleus together. The chemical symbol for Neptunium is Np. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). Lutetium is a silvery white metal, which resists corrosion in dry air, but not in moist air. 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. The information contained in this website is for general information purposes only. The chemical symbol for Indium is In. © 2019 periodic-table.org / see also Titanium is a chemical element with atomic number 22 which means there are 22 protons and 22 electrons in the atomic structure. Berkelium is a member of the actinide and transuranium element series. Californium is an actinide element, the sixth transuranium element to be synthesized, and has the second-highest atomic mass of all the elements that have been produced in amounts large enough to see with the unaided eye (after einsteinium). Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. On the atomic scale, physicists have found that quantum mechanics describes things very well on that scale. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Discoverer: Coster, Dirk and De Hevesy, George Charles, Discoverer: Elhuyar, Juan José and Elhuyar, Fausto, Discoverer: Noddack, Walter and Berg, Otto Carl and Tacke, Ida. The chemical symbol for Phosphorus is P. 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. Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. ChEBI Phosphorus P-32 is a radioactive isotope of phosphorus with beta particle-emitting radiocytotoxic activity. Atomic Number of Phosphorus. Hafnium is a lustrous, silvery gray, tetravalent transition metal, hafnium chemically resembles zirconium and is found in many zirconium minerals. The size and mass of atoms are so small that the use of normal measuring units, while possible, is often inconvenient. 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. Dysprosium is a chemical element with atomic number 66 which means there are 66 protons and 66 electrons in the atomic structure. Atomic weight of Phosphorus is 30.973762 u or g/mol. Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. It is fairly soft and slowly tarnishes in air. Hydrogen is a chemical element with atomic number 1 which means there are 1 protons and 1 electrons in the atomic structure. The mass number of of atoms in an element is equal to the sum total of the number of neutrons and protons. The chemical symbol for Americium is Am. Atomic Number of Phosphorus. Lutetium is the last element in the lanthanide series, and it is traditionally counted among the rare earths. The unit of measure for mass is the atomic mass unit (amu) . We assume no responsibility for consequences which may arise from the use of information from this website. The chemical symbol for Samarium is Sm. For other isotopes, the isotopic mass usually differs and is usually within 0.1 u of the mass number. The chemical symbol for Krypton is Kr. The chemical symbol for Antimony is Sb. Cerium is a chemical element with atomic number 58 which means there are 58 protons and 58 electrons in the atomic structure. Ruthenium is a rare transition metal belonging to the platinum group of the periodic table. 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. 113Cd has specific absorption cross-section. The chemical symbol for Fermium is Fm. All of its isotopes are radioactive. The various species of atoms whose nuclei contain particular numbers of protons and neutrons are called nuclides. Xenon is a chemical element with atomic number 54 which means there are 54 protons and 54 electrons in the atomic structure. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. Its properties are thus intermediate between those of chlorine and iodine. 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. Like the other metals of the platinum group, ruthenium is inert to most other chemicals. Phosphorus - Protons - Neutrons - Electrons - Electron Configuration. 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. e. It has 8 electrons in its outer electron shell. Europium is one of the least abundant elements in the universe. If we include man made elements, the densest so far is Hassium. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Dysprosium is used for its high thermal neutron absorption cross-section in making control rods in nuclear reactors, for its high magnetic susceptibility in data storage applications. 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. Atomic Mass of Phosphorus. 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. The chemical symbol for Zinc is Zn. Bismuth is a chemical element with atomic number 83 which means there are 83 protons and 83 electrons in the atomic structure. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 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. nucleus. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Palladium is a chemical element with atomic number 46 which means there are 46 protons and 46 electrons in the atomic structure. Therefore, there are various non-equivalent definitions of atomic radius. The chemical symbol for Protactinium is Pa. Protactinium is a dense, silvery-gray metal which readily reacts with oxygen, water vapor and inorganic acids. Nuclides that have the same neutron number but a different proton number are called isotones. The Cookies Statement is part of our Privacy Policy. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. It is a noble metal and a member of the platinum group. Caesium has physical and chemical properties similar to those of rubidium and potassium. 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 information contained in this website is for general information purposes only. Europium is a chemical element with atomic number 63 which means there are 63 protons and 63 electrons in the atomic structure. Thorium is commonly found in monazite sands (rare earth metals containing phosphate mineral). This website was founded as a non-profit project, build entirely by a group of nuclear engineers. The metal is found in the Earth’s crust in the pure, free elemental form (“native silver”), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Like all elements with atomic number over 100, nobelium can only be produced in particle accelerators by bombarding lighter elements with charged particles. The atomic mass is the mass of an atom. Atomic Number of Phosphorus. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. Melting point: 111.57 degrees Fahrenheit (44.15 degrees Celsius) 7. Gadolinium belongs to a rare earth elements (it is one of a set of seventeen chemical elements in the periodic table). 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. Uranium is a silvery-white metal in the actinide series of the periodic table. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. The chemical symbol for Beryllium is Be. Erbium is a silvery-white solid metal when artificially isolated, natural erbium is always found in chemical combination with other elements. The nucleus is composed of protons and neutrons. Phosphorus P Element 15 Mass Number: 31 Atomic weight: 30.97 g/mol Atomic number (Z): 15 Electrons: 15 Protons: 15 Neutrons: 16 Period: 3 Group: 15 Block: p Name: Phosphorus Symbol: P Atomic Number: 15 Atomic Mass: 30.97376 amu Melting Point: 44.1 °C (317.25 K, 111.38 °F) Boiling Point: 280.0 °C (553.15 K, 536.0 °F) Number of Protons/Electrons: 15 Number of Neutrons: 16 Classification: Non-metal Crystal Structure: Monoclinic Density @ 293 K: 1.82 g/cm 3 Color: white Atomic Structure Manganese is a chemical element with atomic number 25 which means there are 25 protons and 25 electrons in the atomic structure. Atomic Number of Phosphorus is 15.. Chemical symbol for Phosphorus is P. Number of protons in Phosphorus is 15. Phosphorus is the second element in the fifteenth column of the period table. Promethium is a chemical element with atomic number 61 which means there are 61 protons and 61 electrons in the atomic structure. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. 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. 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. The chemical symbol for Lanthanum is La. Note that, each element may contain more isotopes, therefore this resulting atomic mass is calculated from naturally-occuring isotopes and their abundance. Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. It has an estimated density of 40.7 x 103 kg/m3. Consequently, the smallest atom is helium with a radius of 32 pm, while one of the largest is caesium at 225 pm. Samarium is a typical member of the lanthanide series, it is a moderately hard silvery metal that readily oxidizes in air. But this “huge” space is occupied primarily by electrons, because the nucleus occupies only about 1721×10−45 m3 of space. Platinum is used in catalytic converters, laboratory equipment, electrical contacts and electrodes, platinum resistance thermometers, dentistry equipment, and jewelry. Thorium is moderately hard, malleable, and has a high melting point. Curium is a hard, dense, silvery metal with a relatively high melting point and boiling point for an actinide. Therefore, the effective nuclear charge towards the outermost electrons increases, drawing the outermost electrons closer. The chemical symbol for Potassium is K. Potassium was first isolated from potash, the ashes of plants, from which its name derives. The chemical symbol for Molybdenum is Mo. Like all elements with atomic number over 100, lawrencium can only be produced in particle accelerators by bombarding lighter elements with charged particles. It may seem, that the space and in fact the matter is empty, but it is not. 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. a. Phosphorus-32, a radioactive isotope of phosphorus-31 (atomic number 15), undergoes a form of radioactive decay whereby a neutron turns into a proton, which is retained in … According to the Jefferson Lab, the properties of phosphorus are: 1. Carbon is a chemical element with atomic number 6 which means there are 6 protons and 6 electrons in the atomic structure. The atomic mass of phosphorus is 30.973762 u. Most materials expand when their temperatures increase. Discoverer: Davy, Sir H. and Thénard, L.-J. The chemical symbol for Einsteinium is Es. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Iron is a metal in the first transition series. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. Holmium is a chemical element with atomic number 67 which means there are 67 protons and 67 electrons in the atomic structure. The classical description cannot be used to describe things on the atomic scale. The chemical symbol for Astatine is At. Arsenic is a chemical element with atomic number 33 which means there are 33 protons and 33 electrons in the atomic structure. It is one of the least reactive chemical elements and is solid under standard conditions. Phosphorus-32 atom is the radioactive isotope of phosphorus with relative atomic mass 31.973907 and half-life of 14.26 days. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure.  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. Potassium is a chemical element with atomic number 19 which means there are 19 protons and 19 electrons in the atomic structure. The chemical symbol for Mercury is Hg. Terbium is a silvery-white, rare earth metal that is malleable, ductile, and soft enough to be cut with a knife. Lead has the highest atomic number of any stable element and concludes three major decay chains of heavier elements. 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. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Due to the quantum nature of electrons, the electrons are not point particles, they are smeared out over the whole atom. The Standard English unit is pounds mass per cubic foot (lbm/ft3). It is the 12 th most abundant element in Earth’s crust. Tin is a post-transition metal in group 14 of the periodic table. Caesium is a chemical element with atomic number 55 which means there are 55 protons and 55 electrons in the atomic structure. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. The chemical symbol for Niobium is Nb. 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. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. Osmium is the densest naturally occurring element, with a density of 22.59 g/cm3. 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. Phosphorus is a chemical element with atomic number 15 which means there are 15 protons and 15 electrons in the atomic structure. Mass numbers of typical isotopes of Phosphorus are 31. See also: Atomic Number – Does it conserve in a nuclear reaction? At 0.099%, phosphorus is the most abundant pnictogen in the Earth’s crust. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. The chemical symbol for Uranium is U. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? The chemical symbol for Radon is Rn. Aluminum is a chemical element with atomic number 13 which means there are 13 protons and 13 electrons in the atomic structure. It is even less abundant than the so-called rare earths. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. Arsenic occurs in many minerals, usually in combination with sulfur and metals, but also as a pure elemental crystal. Rubidium is a chemical element with atomic number 37 which means there are 37 protons and 37 electrons in the atomic structure. Selenium is a nonmetal with properties that are intermediate between the elements above and below in the periodic table, sulfur and tellurium, and also has similarities to arsenic. Phosphorus is a monoisotopic element and its atomic weight is determined solely by its isotope 31 P. The Commission last revised the standard atomic weight of phosphorus in 2013 based on the latest Atomic Mass Evaluation by IUPAP. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). 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 Californium is Cf. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. 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. Phase at room temperature: Solid 6. The chemical symbol for Neodymium is Nd. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. Tungsten is a chemical element with atomic number 74 which means there are 74 protons and 74 electrons in the atomic structure. Cerium is also traditionally considered one of the rare-earth elements. Rubidium is a soft, silvery-white metallic element of the alkali metal group, with an atomic mass of 85.4678. Sodium is a chemical element with atomic number 11 which means there are 11 protons and 11 electrons in the atomic structure. It forms various compounds and is present in large variety of minerals. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Francium is an alkali metal, that has one valence electron. Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. Major advantage of lead shield is in its compactness due to its higher density. Arsenic, Antimony, Bismuth and Moscovium are the other elements in the nitrogen family. In a neutral atom there are as many electrons as protons moving about nucleus. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. The chemical symbol for Gadolinium is Gd. White phosphorus should be kept under water (as it is dangerously reactive in air) and should be handled with forceps, as contact with the skin may cause severe burns. Atomic weight (average mass of the atom): 30.973762 4. 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“). Niobium is a soft, grey, ductile transition metal, often found in the minerals pyrochlore (the main commercial source for niobium) and columbite. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. The chemical symbol for Bromine is Br. It is an intensive property, which is mathematically defined as mass divided by volume: The atom consist of a small but massive nucleus surrounded by a cloud of rapidly moving electrons. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. Carbon is one of the few elements known since antiquity. Our Privacy Policy is a legal statement that explains what kind of information about you we collect, when you visit our Website. Rhodium is a rare, silvery-white, hard, corrosion resistant and chemically inert transition metal. Approximately 60–70% of thallium production is used in the electronics industry. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Being a typical member of the lanthanide series, europium usually assumes the oxidation state +3. ›› Phosphorus molecular weight. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. 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. The chemical symbol for Europium is Eu. The chemical symbol for Argon is Ar. As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. 2) You may not distribute or commercially exploit the content, especially on another website. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. The chemical properties of the atom are determined by the number of protons, in fact, by number and arrangement of electrons. Antimony compounds have been known since ancient times and were powdered for use as medicine and cosmetics, often known by the Arabic name, kohl. Nickel belongs to the transition metals and is hard and ductile. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. The chemical symbol for Thulium is Tm. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. Molar mass of P = 30.973761 g/mol. Mendelevium is a chemical element with atomic number 101 which means there are 101 protons and 101 electrons in the atomic structure. Fermium is a chemical element with atomic number 100 which means there are 100 protons and 100 electrons in the atomic structure. The bulk properties of astatine are not known with any certainty. Main purpose of this project is to help the public learn some interesting and important information about chemical elements, ionizing radiation, thermal engineering, reactor physics and nuclear energy. There are over 100 different borate minerals, but the most common are: borax, kernite, ulexite etc. Our Website follows all legal requirements to protect your privacy. Zirconium is a chemical element with atomic number 40 which means there are 40 protons and 40 electrons in the atomic structure. 31.14 amu. The chemical symbol for Xenon is Xe. The part of the atom where the electrons CANNOT be found is the. Molybdenum a silvery metal with a gray cast, has the sixth-highest melting point of any element. Magnesium is a chemical element with atomic number 12 which means there are 12 protons and 12 electrons in the atomic structure. We use cookies to ensure that we give you the best experience on our website. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. 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. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Lawrencium is the final member of the actinide series. Atomic mass of Phosphorus is 30.9738 u.. In nuclear industry, especially natural and artificial samarium 149 has an important impact on the operation of a nuclear reactor.
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