Lithium | Chemistry

Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada

Lithium, 3, Chemistry Department University of Waterloo, Waterloo, ON

Lithium: In 1817, Johan August Arfwedson, then working in the laboratory of the chemist Jöns Jakob Berzelius, detected the presence of a new element while analyzing petalite ore. Since the new element had been found in an ore, Berzelius called it "lithium," from the Greek word "lithos," meaning "stone." Elemental lithium was first isolated in 1821 by electrolysis of lithium oxide by William Thomas Brande. As with all alkali metals, elemental lithium is highly reactive and is stored away from air.

Lithium and its compounds have several industrial applications, including heat-resistant glass and ceramics, high strength-to-weight alloys used in aircraft, pharmaceuticals and lithium-ion batteries, which are anticipated to power electric and hybrid electric vehicles in the near future and the focal point of my research at the University of Waterloo. In the picture, a futuristic electric vehicle is seen driving across the Salar de Uyuni, a salt flat in Bolivia, one of the richest sources of natural lithium in the world.

Brian Ellis, Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada

Atomic properties*

Name:

Lithium

Symbol:

Li

Atomic number:

3

Atomic mass:

6.941 amu

Melting point:

180.5°C

Boiling point:

1342°C

Density:

0.53 g/cm³

Electronegativity:

0.98

# of Isotopes:

2

State:

Solid

Colour:

Silvery-white-grey±

Classification:

Metallic±

* Haynes, W. M. (2011). Melting, Boiling, Triple and Critical Point Temperatures of the Elements. Retrieved April 7, 2011, from CRC Handbook of Chemistry and Physics, 91st edition: http://www.hbcponline.com/

± Winter, M. (2010). Home of the Periodic Table. Retrieved April 8, 2011, from Web Elements: http://www.webelements.com/