Question

what is the world's rarest metal

Answer 1

radium , a group 2nd element

Answer 2

Answer:

Rhodium is the world's rarest metal.

Explanation:

Rhodium is a chemical element with symbol Rh and atomic number 45. It has a high melting point and an amazing ability to with stand corrosion.

Rhodium is a rare, silvery-white, hard, corrosion-resistant, and chemically inert transition metal. It is a noble metal and a member of the platinum group.

Rhodium plating is often added onto white gold or silver jewelry and engagement and wedding bands in particular to increase shine, luster and durability.

Rhodium plating will also make the metal more scratch resistant and when used on silver jewelry, less prone to rusting.