Lithium

Lithium is a chemical element, having the chemical symbol Li.

Lithium 6.941(2)   Li 3 1s2 2s1 1,2,s [ ? ] Alkali metal:

Its atomic number (the number of protons) is 3. It has a Standard Atomic Weight of 6.941(2), and is typically found as a solid in its elemental form.

Lithium is considered to be a member of the "Alkali metal" class of elements, has a boiling point of 1342 °C , and a melting point of 180.5 °C .