Rhodium (Rh)

Atomic Number: 45

Relative Atomic Mass: 102.90550

Electronegativity: 2.28

Atomic Radius (Picometers): 135

Appearance: Silver-White

Occurrence: Natural

Melting Point (Kelvin): 2237

Boiling Point (Kelvin): 3968

Stable Isotopes: 103

Discoverer: William Wollaston in 1804

Properties: Hard, Inert

First Use: Thermocouples (19th / Early 20th Century)

Modern Uses: Catalytic Converter, Electroplating 

Picture Courtesy of Alchemist-hp

©2011 Grant Dwyer