Rhodium

By: Ciara Barreto Mrs. Hooper

Properties of Rhodium

Atomic Mass: 102.900550

Atomic Number: 45

Atomic Radius: 173 pm (picometers)

Density: 12.450 g/cc

Melting Point: 1964 degrees Celsius (3567 degrees F)

Boiling point: 3695 degrees Celsius (6683 degrees F)

Solid

Appearance: hard, shiny, silvery

Malleable

Conductivity: {thermal 150 W m(-1) k(-1)} {electrical 23 x 10(6) S m(-1)}

Not flammable

Identifying Information

Atomic Number: 45

Mass Number: 103

Protons: 45

Electrons: 45

Nuetrons: 58

It's located in group 9 period 5

How it was discovered

-Discovered in 1803, in England by William Hyde Wollastan

-William Hyde Wollaston discovered Rhodium shortly after discovering Palladium. He found Rhodium from a sample of a Platinum ore in South America. After he had removed the Palladium and Platinum he was left with a dark red powder. That powder was Sodium Rhodium Chloride.

Applications and Uses

Rhodium is a very hard element to obtain. When obtained Rhodium is used for mostly jewelry purposes. Rhodium is involved in a process called electroplating. That basically means to coat. They electroplate white gold or platinum with a reflective coating. This process is used in jewelry making as well as Rhodium process of coating silver to prevent tarnishing during wear.

Sources

- Element Card: Gray, Theodore W. (2008). The Photographic Card Deck of the Elements.

- Elements Book: Gray, Theodore W. (2009). The Elements: A visual exploration of every known atom in the universe. New York: Black Dog & Leventhal Publishers, Inc.

- http://www.chemicool.com/elements/rhodium.html

- http://education.jlab.org/itselemental/ele045.html

Fun Facts

1. Rhodium is one of the rarest elements.

2. There are 25 radioactive isotopes

3. Rhodium is a waste product of nuclear fission UR-235

4. A major commercial use for Rhodium is for automatic catalytic converters where they reduce harmful emissions from cars by converting Carbon Monoxide and other gases into less poisonous gases.