Curium

Actinide · 247.07035 u · group 3, period 7

Curium · Cm

Atomic number96

SymbolCm

CategoryActinide

Standard stateSolid

Group · Period · Block3 · 7 · f

Electron configuration[Rn]7s2 5f7 6d1

Atomic mass247.07035 u

Atomic radius245 pm

Protons / Neutrons / Electrons96 / 151 / 96

Shells (e⁻ per shell)2, 8, 18, 32, 25, 9, 2

Electronegativity (Pauling)1.3

Ionization energy6.02 eV

Electron affinity—

Oxidation states+3

Melting point1.62e+3 K · 1.34e+3 °C

Boiling point3.40e+3 K · 3.13e+3 °C

Density13.51 g/cm³

Year discovered1944

CPK color

#785CE3

State at room temp (25 °C)

solid

Position