Lithium

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

Lithium is an element in the alkali metals class of the periodic table. It is the lightest solid element -- about half the density of water. Like the other alkali metals, lithium reacts violently with water; it is usually stored in oil. Lithium tablets are frequently used in the treatment of bipolar disorder and some other mental health conditions.