Rhenium

Transition metal · 186.207 u · group 7, period 6

Rhenium · Re

Atomic number75

SymbolRe

CategoryTransition metal

Standard stateSolid

Group · Period · Block7 · 6 · d

Electron configuration[Xe]6s2 4f14 5d5

Atomic mass186.207 u

Atomic radius217 pm

Protons / Neutrons / Electrons75 / 111 / 75

Shells (e⁻ per shell)2, 8, 18, 32, 13, 2

Electronegativity (Pauling)1.9

Ionization energy7.88 eV

Electron affinity0.15 eV

Oxidation states+7, +6, +4

Melting point3.46e+3 K · 3.19e+3 °C

Boiling point5.87e+3 K · 5.60e+3 °C

Density20.8 g/cm³

Year discovered1925

CPK color

#267DAB

State at room temp (25 °C)

solid

Position