As the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine. In some respects zinc is chemically similar to magnesium: both elements exhibit only one normal oxidation state (+2), and the Zn2+ and Mg2+ ions are of similar size. Silver is a soft, white, lustrous transition metal, it exhibits the highest electrical conductivity, thermal conductivity, and reflectivity of any metal. If you continue to use this site we will assume that you are happy with it. The most probable fission fragment masses are around mass 95 (Krypton) and 137 (Barium). The chemical symbol for Terbium is Tb. The most stable known isotope, 269Hs, has a half-life of approximately 9.7 seconds. Bromine has two isotopes, Br- 79 and Br- 81. Zirconium is a lustrous, grey-white, strong transition metal that resembles hafnium and, to a lesser extent, titanium. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal. Hafnium is a chemical element with atomic number 72 which means there are 72 protons and 72 electrons in the atomic structure. Fermium is a member of the actinide series. Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. Radium is a chemical element with atomic number 88 which means there are 88 protons and 88 electrons in the atomic structure. Antimony is a lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite. Tin is a post-transition metal in group 14 of the periodic table. The Cookies Statement is part of our Privacy Policy. Nickel belongs to the transition metals and is hard and ductile. The chemical symbol for Cobalt is Co. Cobalt is found in the Earth’s crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The atomic mass of bromine (Br) is 79.90. How long does a fresh turkey last in the refrigerator? The chemical symbol for Zirconium is Zr. Rhenium is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. Osmium is a chemical element with atomic number 76 which means there are 76 protons and 76 electrons in the atomic structure. Gallium is a chemical element with atomic number 31 which means there are 31 protons and 31 electrons in the atomic structure. Gold is thought to have been produced in supernova nucleosynthesis, from the collision of neutron stars. Astatine is the rarest naturally occurring element on the Earth’s crust. The chemical symbol for Mercury is Hg. Like all halogens, it is thus one electron short of a full octet, and is hence a strong oxidising agent, reacting with many elemen… Calcium is an alkaline earth metal, it is a reactive pale yellow metal that forms a dark oxide-nitride layer when exposed to air. Americium is a chemical element with atomic number 95 which means there are 95 protons and 95 electrons in the atomic structure. Boron is a chemical element with atomic number 5 which means there are 5 protons and 5 electrons in the atomic structure. The atomic mass is the mass of an atom. 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. How long was Margaret Thatcher Prime Minister? Zirconium is widely used as a cladding for nuclear reactor fuels. Titanium is resistant to corrosion in sea water, aqua regia, and chlorine. The chemical symbol for Osmium is Os. The size and mass of atoms are so small that the use of normal measuring units, while possible, is often inconvenient. Zirconium is mainly used as a refractory and opacifier, although small amounts are used as an alloying agent for its strong resistance to corrosion. Nobelium is the tenth transuranic element and is the penultimate member of the actinide series. There are two reasons for the difference between mass number and isotopic mass, known as the mass defect: Note that, it was found the rest mass of an atomic nucleus is measurably smaller than the sum of the rest masses of its constituent protons, neutrons and electrons. The first alloy used on a large scale was bronze, made of tin and copper, from as early as 3000 BC. The unit of measure for mass is the atomic mass unit (amu). Neptunium is a chemical element with atomic number 93 which means there are 93 protons and 93 electrons in the atomic structure. Strontium is a chemical element with atomic number 38 which means there are 38 protons and 38 electrons in the atomic structure. Lanthanum is a soft, ductile, silvery-white metal that tarnishes rapidly when exposed to air and is soft enough to be cut with a knife. Mass numbers of typical isotopes of Bromine are 79; 81. It occurs on Earth as the decay product of various heavier elements. A freshly exposed surface of pure copper has a reddish-orange color. Bromine has two naturally occuring isotopes (Br-79 and Br-81) and has an atomic mass of 79.904 amu. Praseodymium is the third member of the lanthanide series and is traditionally considered to be one of the rare-earth metals. Chemically, indium is similar to gallium and thallium. 3 moles Bromine to grams = 239.712 grams. All isotopes of radium are highly radioactive, with the most stable isotope being radium-226. 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. Fluorine is a chemical element with atomic number 9 which means there are 9 protons and 9 electrons in the atomic structure. Actinium is a soft, silvery-white radioactive metal. Its boiling point is the lowest among all the elements. Natural boron consists primarily of two stable isotopes, 11B (80.1%) and 10B (19.9%). Discoverer: Corson, Dale R. and Mackenzie, K. R. The actinide or actinoid series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium through lawrencium.

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