Lithium (Li) — Element 3

3 Li 6.941

Lithium

Element 3 · 6.941 u · s-block

alkali metal

The lightest metal and least dense solid element. Key component in rechargeable batteries and mood-stabilizing medication.

Phase (STP)

Solid

Melting Point

180.54 °C

Boiling Point

1342 °C

Density

0.534 g/cm³

Electronegativity

0.98

Atomic Radius

145 pm

Ionization Energy

520 kJ/mol

Electron Affinity

60 kJ/mol

Discovered

1817 · Johan August Arfwedson

Electron Configuration

[He] 2s1