Rhenium
Chemical element
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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, rhenium is one of the... Wikipedia
Symbol: Re
Atomic number: 75
Atomic mass: 186.207 u
Boiling point: 10,110°F (5,597°C)
Melting point: 5,765°F (3,185°C)
Discoverers: Ida Noddack, Walter Noddack, and Otto Berg
Electron configuration: Xe 4f14 5d5 6s2