By mass, aluminium makes up about 8% of the Earth’s 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. The chemical symbol for Calcium is Ca. It is the fourth most common element in the Earth’s crust. Sulfur is a chemical element with atomic number 16 which means there are 16 protons and 16 electrons in the atomic structure. Atomic Mass Number – Does it conserve in a nuclear reaction? Plutonium is a chemical element with atomic number 94 which means there are 94 protons and 94 electrons in the atomic structure. It can be observed from the chart that there are more neutrons than protons in nuclides with Z greater than about 20 (Calcium). Neodymium is a chemical element with atomic number 60 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. Lanthanum is a chemical element with atomic number 57 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. Platinum is a chemical element with atomic number 78 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. The chemical symbol for Titanium is Ti. Radon is a chemical element with atomic number 86 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. Copper is a chemical element with atomic number 29 which means there are 29 protons and 29 electrons in the atomic structure. The chemical symbol for Platinum is Pt. Dysprosium is a chemical element with atomic number 66 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. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. The chemical symbol for Nitrogen is N. Nitrogen is a colourless, odourless unreactive gas that forms about 78% of the earth’s atmosphere. Protactinium is a chemical element with atomic number 91 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. The chemical symbol for Mercury is 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. Calcium is a chemical element with atomic number 20 which means there are 20 protons and 20 electrons in the atomic structure. This equilibrium also known as “samarium 149 reservoir”, 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. 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. 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. Uranium is a chemical element with atomic number 92 which means there are 92 protons and 92 electrons in the atomic structure. The chemical symbol for Vanadium is V. Vanadium is a hard, silvery grey, ductile, and malleable transition metal. Copper is a chemical element with atomic number 29 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 is pounds mass per cubic foot (lbm/ft3). Its monatomic form (H) is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass. The chemical symbol for Lanthanum is 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. Yttrium is a chemical element with atomic number 39 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 of 40.7 x 103 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. Titanium is a chemical element with atomic number 22 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. The chemical symbol for Rhodium is 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, 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. 12.0107*3 + 1.00794*6. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? Lawrencium is the final member of the actinide series. The chemical symbol for Zinc is Zn. Actinium is a chemical element with atomic number 89 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.