Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Significant concentrations of boron occur on the Earth in compounds known as the borate minerals. Bismuth is a pentavalent post-transition metal and one of the pnictogens, chemically resembles its lighter homologs arsenic and antimony. Each nuclide is denoted by chemical symbol of the element (this specifies Z) with tha atomic mass number as supescript. The chemical symbol for Radium is Ra. The chemical symbol for Promethium is Pm. Zirconium is widely used as a cladding for nuclear reactor fuels. Berkelium is a member of the actinide and transuranium element series. Under standard conditions, it is the lightest metal and the lightest solid element. The chemical symbol for Dysprosium is Dy. It rarely occurs in its elemental state or as pure ore compounds in the Earth’s crust. The chemical symbol for Krypton is Kr. Bromine is the third-lightest halogen, and is a fuming red-brown liquid at room temperature that evaporates readily to form a similarly coloured gas. 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 Xenon is Xe. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table. In nuclear industry cadmium is commonly used as a thermal neutron absorber due to very high neutron absorption cross-section of 113Cd. The chemical symbol for Thallium is Tl. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. The atomic mass of a helium atom is 4.0026 u. Median response time is 34 minutes and may be longer for new subjects. The chemical symbol for Helium is He. It has remarkable resistance to corrosion, even at high temperatures, and is therefore considered a noble metal. Chlorine is a chemical element with atomic number 17 which means there are 17 protons and 17 electrons in the atomic structure. The chemical symbol for Helium is He. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. 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. The chemical symbol for Titanium is Ti. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). is a rare earth element with a metallic silver luster. According to the Einstein relationship (E=mc2), this binding energy is proportional to this mass difference and it is known as the mass defect. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. Mercury is a heavy, silvery d-block element, mercury is the only metallic element that is liquid at standard conditions for temperature and pressure. Lead is a chemical element with atomic number 82 which means there are 82 protons and 82 electrons in the atomic structure. The chemical symbol for Argon is Ar. See also: Atomic Mass Number – Does it conserve in a nuclear reaction? Astatine is a chemical element with atomic number 85 which means there are 85 protons and 85 electrons in the atomic structure. The chemical symbol for Tin is Sn. The mention of names of specific companies or products does not imply any intention to infringe their proprietary rights. 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. Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Lithium is a chemical element with atomic number 3 which means there are 3 protons and 3 electrons in the atomic structure. Neptunium metal is silvery and tarnishes when exposed to air. The chemical symbol for Silicon is Si. 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. Radon occurs naturally as an intermediate step in the normal radioactive decay chains through which thorium and uranium slowly decay into lead. Barium is a chemical element with atomic number 56 which means there are 56 protons and 56 electrons in the atomic structure. The chemical symbol for Curium is Cm. It is equal to weight of fluid displaced by... Q: A 541-Watt toaster is connected to a 120-V household outlet. The chemical symbol for Molybdenum is Mo. Titanium is a lustrous transition metal with a silver color, low density, and high strength. 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. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. 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. Silver is a chemical element with atomic number 47 which means there are 47 protons and 47 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. The chemical symbol for Neodymium is Nd. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes.

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