Lithium

Alkali metal · 7.0 u · group 1, period 2

Lithium · Li

Atomic number3

SymbolLi

CategoryAlkali metal

Standard stateSolid

Group · Period · Block1 · 2 · s

Electron configuration[He]2s1

Atomic mass7.0 u

Atomic radius182 pm

Protons / Neutrons / Electrons3 / 4 / 3

Shells (e⁻ per shell)2, 1

Electronegativity (Pauling)0.98

Ionization energy5.392 eV

Electron affinity0.618 eV

Oxidation states+1

Melting point453.6 K · 180.5 °C

Boiling point1.62e+3 K · 1.34e+3 °C

Density0.534 g/cm³

Year discovered1817

CPK color

#CC80FF

State at room temp (25 °C)

solid

Position