The masss number of xenon(Xe) is the number of protons plus neutrons of a specific isotope of xenon(Xe) . Praseodymium is a soft, silvery, malleable and ductile metal, valued for its magnetic, electrical, chemical, and optical properties. Helium is a chemical element with atomic number 2 which means there are 2 protons and 2 electrons in the atomic structure. The chemical symbol for Radon is Rn. Cerium is a soft, ductile and silvery-white metal that tarnishes when exposed to air, and it is soft enough to be cut with a knife. In nuclear reactors, promethium equilibrium exists in power operation. There are 6 protons in accordance with the proton number in the subscript. Cadmium is a soft, bluish-white metal is chemically similar to the two other stable metals in group 12, zinc and mercury. The chemical symbol for Xenon is Xe. Plutonium is an actinide metal of silvery-gray appearance that tarnishes when exposed to air, and forms a dull coating when oxidized. Platinum is one of the least reactive metals. E. Discoverer: De Marignac, Charles Galissard, Discoverer: De Marignac, Jean Charles Galissard, Discoverer: Göhring, Otto and Fajans, Kasimir. Bromine is a chemical element with atomic number 35 which means there are 35 protons and 35 electrons in the atomic structure. VanadiumÂ is a chemical element withÂ atomic numberÂ 23Â which means there are 23 protons and 23 electrons in the atomic structure. It is the heaviest essential mineral nutrient. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Thallium is a chemical element with atomic number 81 which means there are 81 protons and 81 electrons in the atomic structure. The chemical symbol for Californium is Cf. There are 52 protons and 52 electrons in an atom of tellurium since its atomic number is 52. Protons, Neutrons, Electrons Name of Element Element Symbol Mass Number Atomic Number Protons Neutrons Electrons Boron B 11 5 5 6 5 Sodium 24 11 Gallium 31 37 Y 89 39 Copper 29 35 Tc 98 43 Pb 207 Ytterbium 103 70 Ac 227 89 Mo 54 Thallium 204 81 Fm 100 157 No 259 H Carbon 12 C 6 6 6 6 Na 11 13 11 Ga 68 31 31 Yttrium Technetium Lead Actinium Molybdenum Fermium Nobelium Hydrogen Cu Y … 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. Gold is a bright, slightly reddish yellow, dense, soft, malleable, and ductile metal. Neptunium metal is silvery and tarnishes when exposed to air. The commercial use of beryllium requires the use of appropriate dust control equipment and industrial controls at all times because of the toxicity of inhaled beryllium-containing dusts that can cause a chronic life-threatening allergic disease in some people called berylliosis. Beryllium is a hard, grayish metal naturally found in mineral rocks, coal, soil, and volcanic dust. If a neutral atom has 10 protons, it must have 10 electrons. Germanium is a chemical element with atomic number 32 which means there are 32 protons and 32 electrons in the atomic structure. Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs). Chemically, indium is similar to gallium and thallium. Electrons The mass of an electron is 1.1 * 10^-31 kg.
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