lithium

helium$\longleftarrow$ 3 $\longrightarrow$beryllium

Pronunciation

• enPR: lĭth'ēəm, IPA ^(key): /ˈlɪθi.əm/

• Audio (US)

  (file)

• Hyphenation: lith‧i‧um

Noun

Singular lithium

Plural none

1. Lithium is a light silver-grey metal. It has an atomic number of 3 and the symbol Li. It is the first alkali metals.

   Lithium reacts very easily. It even reacts with water.

   The lightest metal known is lithium.