NO. 003Alkali

Li

Lithium

Lithium is a soft, silvery metal and the lightest solid element.

Crystal Structure

Body-centered cubic (bcc)

Atomic Mass6.94 u

Density0.534 g/cm³

Melting Point453.7 K

Boiling Point1603 K

Atomic Radius167 pm

Electronegativity0.98

Ionization Energy520 kJ/mol

Electron Affinity59.6 kJ/mol

Bonding TypeMetallic

Oxidation States1

Acid/BaseBasic

ReactivityHigh

Electron Configuration

[He] 2s1

Discovered ByJohan August Arfwedson

Year1817

Known Isotopes

Lithium-6Lithium-7