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Rhenium is a chemical element; it has symbol Re and atomic number 75. It is a silvery-gray, heavy, third-row transition metal in group 7 of the periodic table . With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust .
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A chemical element, often simply called an element, is a type of atom which has a specific number of protons in its atomic nucleus (i.e., a specific atomic number, or Z). [ 1 ] The definitive visualisation of all 118 elements is the periodic table of the elements , whose history along the principles of the periodic law was one of the founding ...
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Template: Periodic table ... Electron configurations of the chemical elements ... Re 2 14 5 - 76 Os 2 14 6 - 77 Ir 2 14 7 - 78 Pt 1 14 9 - 79 Au 1 14 10 - 80 Hg 2 14
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