Scandium

Transition metal · 44.95591 u · group 3, period 4

Scandium · Sc

Atomic number21

SymbolSc

CategoryTransition metal

Standard stateSolid

Group · Period · Block3 · 4 · d

Electron configuration[Ar]4s2 3d1

Atomic mass44.95591 u

Atomic radius211 pm

Protons / Neutrons / Electrons21 / 24 / 21

Shells (e⁻ per shell)2, 8, 9, 2

Electronegativity (Pauling)1.36

Ionization energy6.561 eV

Electron affinity0.188 eV

Oxidation states+3

Melting point1.81e+3 K · 1.54e+3 °C

Boiling point3.11e+3 K · 2.84e+3 °C

Density2.99 g/cm³

Year discovered1879

CPK color

#E6E6E6

State at room temp (25 °C)

solid

Position