rhodium

Rhodium is a chemical element with the symbol Rh and atomic number 45. It is a silvery-white, hard, and chemically inert transition metal. Rhodium is the rarest of the platinum group metals.

Rhodium is found in very small amounts in the Earth's crust. It is extracted from the ores of platinum and nickel.

Rhodium is used in a variety of applications, including:

• Jewellery: Rhodium is used to plate jewellery to make it more resistant to tarnishing.
• Catalytic converters: Rhodium is used in catalytic converters to help reduce emissions from cars.
• Electronics: Rhodium is used in electronics to make contacts and connectors that are resistant to corrosion.
• Medical devices: Rhodium is used in medical devices to make them more resistant to infection.

Rhodium is a very hard and corrosion-resistant metal.