Lithium

Lithium is an elementin the Alkali metals class of the periodic table. It is the lightest solid element--about half the density of water.

Lithium
Properties
Atomic symbol	Li
Atomic number	3
Classification	Alkali metal
Atomic mass	6.941 amu
Other Information
Date of discovery	1817
Name of discoverer	Johann Arfvedson
Name origin	From the Greek word lithos (stone)
Uses	Batteries, ceramics, lubricants
Obtained from	spodumene, lepidolite, pentalite