Lithium is the lightest metal with an atomic number of 3, a chemical symbol of Li, and is in the alkali metal group. It is a reactive silver-white metal discovered in 1817 that is used in batteries, aircraft/spaceship aluminum alloys, calculators, and to treat some illnesses. However, it also plays roles in hydrogen bombs, experimental nuclear reactors, and bombs used for war. Lithium is found in minerals and clays in various countries around the world like Chile, the US, Australia, Russia, China, Zimbabwe, and Canada.