Rhenium

Transition metals · Group 7 · Period 6

Atomic properties

Atomic number	75
Symbol	Re
Standard atomic weight	186.21
Classification	Transition metals
Group	7
Period	6
Block	d-block
Electron configuration	[Xe] 4f14 5d5 6s2
Electronegativity (Pauling)	1.90
Common oxidation states	+7, +4

Physical properties

Phase at 20 °C	Solid
Density	21.02 g/cm³
Melting point	3186 °C
Boiling point	5596 °C
Discovered	1925
CAS number	—

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