The most commonly used spontaneous fission neutron source is the radioactive isotope californium-252. 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 chemical symbol for Fermium is Fm. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. Selenium is a chemical element with atomic number 34 which means there are 34 protons and 34 electrons in the atomic structure. Arsenic is a metalloid. Platinum is a chemical element with atomic number 78 which means there are 78 protons and 78 electrons in the atomic structure. Titanium condenser tubes are usually the best technical choice, however titanium is very expensive material. It is a member of the chalcogen group on the periodic table, a highly reactive nonmetal, and an oxidizing agent that readily forms oxides with most elements as well as with other compounds. Chemically, sulfur reacts with all elements except for gold, platinum, iridium, tellurium, and the noble gases. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air. In the periodic table, potassium is one of the alkali metals. 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. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Technetium is the lightest element whose isotopes are all radioactive; none are stable. They have an energy gap less than 4eV (about 1eV). Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. Argon is the third-most abundant gas in the Earth’s atmosphere, at 0.934% (9340 ppmv). Uranium is a silvery-white metal in the actinide series of the periodic table. The chemical symbol for Tellurium is Te. 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. Rhenium is a chemical element with atomic number 75 which means there are 75 protons and 75 electrons in the atomic structure. The chemical symbol for Titanium is Ti. 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. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. Discoverer: Scientists at Dubna, Russia (1964)/Albert Ghiorso et. Its properties are thus intermediate between those of chlorine and iodine. The three most common basic crystal patterns are: This website was founded as a non-profit project, build entirely by a group of nuclear engineers. Ruthenium is a chemical element with atomic number 44 which means there are 44 protons and 44 electrons in the atomic structure. Nickel belongs to the transition metals and is hard and ductile. Neptunium metal is silvery and tarnishes when exposed to air. Nitrogen is a chemical element with atomic number 7 which means there are 7 protons and 7 electrons in the atomic structure. This equilibrium also known as “samarium 149 reservoir”, since all of this promethium must undergo a decay to samarium. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. The chemical symbol for Berkelium is Bk. Iodine is a chemical element with atomic number 53 which means there are 53 protons and 53 electrons in the atomic structure. How many protons electrons neutrons does Bromine have? Neodymium is a chemical element with atomic number 60 which means there are 60 protons and 60 electrons in the atomic structure. The atomic mass is the mass of an atom. Its boiling point is the lowest among all the elements. The chemical symbol for Neptunium is Np. Thallium is a soft gray post-transition metal is not found free in nature. Discoverer: McMillan, Edwin M. and Abelson, Philip H. Discoverer: Glenn T. Seaborg, Joseph W. Kennedy, Edward M. McMillan, Arthur C. Wohl, Discoverer: Glenn T. Seaborg, Ralph A. James, Leon O. Morgan, Albert Ghiorso, Discoverer: Glenn T. Seaborg, Ralph A. James, Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Kenneth Street, Jr., Albert Ghiorso, Discoverer: Stanley G. Thompson, Glenn T. Seaborg, Bernard G. Harvey, Gregory R. Choppin, Albert Ghiorso, Discoverer: Albert Ghiorso, Glenn T. Seaborg, Torbørn Sikkeland, John R. Walton, Discoverer: Albert Ghiorso, Torbjørn Sikkeland, Almon E. Larsh, Robert M. Latimer, Copyright 2020 Periodic Table | All Rights Reserved |. 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. A low resistivity indicates a material that readily allows the flow of electric current. The chemical symbol for Mendelevium is Md. Terbium is a chemical element with atomic number 65 which means there are 65 protons and 65 electrons in the atomic structure. The chemical symbol for Bismuth is Bi. Bismuth is a brittle metal with a silvery white color when freshly produced, but surface oxidation can give it a pink tinge. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? The chemical symbol for Manganese is Mn. 113Cd has specific absorption cross-section. Zirconium is widely used as a cladding for nuclear reactor fuels. The chemical symbol for Silver is Ag. Francium is an alkali metal, that has one valence electron. Thorium metal is silvery and tarnishes black when exposed to air, forming the dioxide. Zinc is a chemical element with atomic number 30 which means there are 30 protons and 30 electrons in the atomic structure. Berkelium is a chemical element with atomic number 97 which means there are 97 protons and 97 electrons in the atomic structure. Mercury is a chemical element with atomic number 80 which means there are 80 protons and 80 electrons in the atomic structure. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. Mass numbers of typical isotopes of Bromine are 79; 81. BromineThe number of protons in an element is always the same as the atomic number, which is 35 in this case. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. 1) You may use almost everything for non-commercial and educational use.

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