By mass, aluminium makes up about 8% of the Earthâs crust; it is the third most abundant element after oxygen and silicon and the most abundant metal in the crust, though it is less common in the mantle below. 2) You may not distribute or commercially exploit the content, especially on another website. TheÂ chemical symbolÂ for Calcium isÂ Ca. It is the fourth most common element in the Earthâs crust. SulfurÂ is a chemical element withÂ atomic numberÂ 16Â which means there are 16 protons and 16 electrons in the atomic structure. Atomic Mass Number â Does it conserve in a nuclear reaction? PlutoniumÂ is a chemical element withÂ atomic numberÂ 94Â which means there are 94 protons and 94 electrons in the atomic structure. It can be observed from the chart that there areÂ more neutrons than protonsÂ in nuclides withÂ Z greaterÂ than about 20 (Calcium). NeodymiumÂ is a chemical element withÂ atomic numberÂ 60Â which means there are 60 protons and 60 electrons in the atomic structure. Elemental rubidium is highly reactive, with properties similar to those of other alkali metals, including rapid oxidation in air. LanthanumÂ is a chemical element withÂ atomic numberÂ 57Â which means there are 57 protons and 57 electrons in the atomic structure. It is obtained chiefly from the mineral cassiterite, which contains tin dioxide. PlatinumÂ is a chemical element withÂ atomic numberÂ 78Â which means there are 78 protons and 78 electrons in the atomic structure. Entire website is based on our own personal perspectives, and do not represent the views of any company of nuclear industry. Our Website follows all legal requirements to protect your privacy. Arsenic is a metalloid. Actinium is a soft, silvery-white radioactive metal. TheÂ chemical symbolÂ for Titanium isÂ Ti. RadonÂ is a chemical element withÂ atomic numberÂ 86Â which means there are 86 protons and 86 electrons in the atomic structure. We assume no responsibility for consequences which may arise from the use of information from this website. CopperÂ is a chemical element withÂ atomic numberÂ 29Â which means there are 29 protons and 29 electrons in the atomic structure. TheÂ chemical symbolÂ for Platinum isÂ Pt. DysprosiumÂ is a chemical element withÂ atomic numberÂ 66Â which means there are 66 protons and 66 electrons in the atomic structure. The physical form of hydrogen at room temperature and pressure is a colorless and odorless gas. Krypton is a member of group 18 (noble gases) elements. FluorineÂ is a chemical element withÂ atomic numberÂ 9Â which means there are 9 protons and 9 electrons in the atomic structure. TheÂ chemical symbolÂ for Nitrogen isÂ N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earthâs atmosphere. ProtactiniumÂ is a chemical element withÂ atomic numberÂ 91Â which means there are 91 protons and 91 electrons in the atomic structure. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. The name samarium is after the mineral samarskite from which it was isolated. Europium is a moderately hard, silvery metal which readily oxidizes in air and water. Titanium is a lustrous transition metal with a silver color, low density, and high strength. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. TheÂ chemical symbolÂ for Mercury isÂ Hg. Hydrogen is estimated to make up more than 90% of all the atoms three quarters of the mass of the universe! 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). Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. CalciumÂ is a chemical element withÂ atomic numberÂ 20Â which means there are 20 protons and 20 electrons in the atomic structure. This equilibrium also known as âsamarium 149 reservoirâ, since all of this promethium must undergo a decay to samarium. The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. SinceÂ nucleonsÂ (protonsÂ andÂ 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. Because of its closed-shell electron configuration, its density and melting and boiling points differ significantly from those of most other lanthanides. Tungsten is an intrinsically brittle and hard material, making it difficult to work. Like all alkali metals, lithium is highly reactive and flammable, and is stored in mineral oil. UraniumÂ is a chemical element withÂ atomic numberÂ 92Â which means there are 92 protons and 92 electrons in the atomic structure. TheÂ chemical symbolÂ for Vanadium isÂ V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. CopperÂ is a chemical element withÂ atomic numberÂ 29Â which means there are 29 protons and 29 electrons in the atomic structure. Under normal conditions, sulfur atoms form cyclic octatomic molecules with a chemical formula S8. The Standard English unit isÂ pounds mass per cubic footÂ (lbm/ft3). Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. TheÂ chemical symbolÂ for Lanthanum isÂ La. What is Atomic and Nuclear Physics - Definition, What is Atomic and Nuclear Structure - Definition, What is Uranium in the Environment - Definition, Arsenic - Atomic Mass - Atomic Weight - As, Actinium - Atomic Mass - Atomic Weight - Ac, Polonium - Atomic Mass - Atomic Weight - Po, Copernicium - Atomic Mass - Atomic Weight - Cn, Helium – Atomic Mass – Atomic Weight – He. www.nuclear-power.net. Discoverer: Marinsky, Jacob A. and Coryell, Charles D. and Glendenin, Lawerence. Uranium is a silvery-white metal in the actinide series of the periodic table. Chromium is a steely-grey, lustrous, hard and brittle metal4 which takes a high polish, resists tarnishing, and has a high melting point. Naturally occurring potassium is composed of three isotopes, of which 40K is radioactive. YttriumÂ is a chemical element withÂ atomic numberÂ 39Â which means there are 39 protons and 39 electrons in the atomic structure. Tritium has a half-life of 12.3 years. Nickel belongs to the transition metals and is hard and ductile. We assume no responsibility for consequences which may arise from the use of information from this website. 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. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Typical densities of various substances at atmospheric pressure. It has an estimated density ofÂ 40.7 x 103Â kg/m3. 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 Hydrogen is H. With a standard atomic weight of circa 1.008, hydrogen is the lightest element on the periodic table. TitaniumÂ is a chemical element withÂ atomic numberÂ 22Â which means there are 22 protons and 22 electrons in the atomic structure. On the other hand, nuclei with an odd number of protons and neutrons are mostly unstable. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. Uranium has the highest atomic weight of the primordially occurring elements. Major advantage of lead shield is in its compactness due to its higher density. Although neodymium is classed as a rare earth, it is a fairly common element. Einsteinium is the seventh transuranic element, and an actinide. TheÂ chemical symbolÂ for Rhodium isÂ Rh. 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, AndrÃ©s Manuel (1801) and SefstrÃ¶m, Nils Gabriel (1830), Discoverer: Lecoq de Boisbaudran, Paul-Ãmile, Discoverer: Ramsay, Sir William and Travers, Morris, Discoverer: Bunsen, Robert Wilhelm and Kirchhoff, Gustav Robert, Discoverer: Perrier, Carlo and SegrÃ¨, Emilio, Discoverer: Reich, Ferdinand and Richter, Hieronymus, Discoverer: MÃ¼ller von Reichenstein, Franz Joseph, Discoverer: Ramsay, William and Travers, Morris William, Discoverer: Kirchhoff, Gustav and Bunsen, Robert. 12.0107*3 + 1.00794*6. See also:Â Atomic Mass Number â Does it conserve in a nuclear reaction? Lawrencium is the final member of the actinide series. TheÂ chemical symbolÂ for Zinc isÂ Zn. ActiniumÂ is a chemical element withÂ atomic numberÂ 89Â which means there are 89 protons and 89 electrons in the atomic structure. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. Formula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction.