The Three Rarest Elements in the World

Osmium

Osmium was discovered by Smithson Tennant in 1803, England. It's symbol is Os, and the origin of the name comes form the the Greek word osmë, meaning odor due to its garlic and chlorine like smell.

P: 76 E: 76 Average Atomic Mass: 190.23 Atomic #: 76
osmium

Three cool facts about this element

  1. It is not affected by most acids.
  2. It is found in platinum ores and in a mineral called osmiridium, which is very rare.
  3. It has the highest melting point and the lowest vapor pressure of the platinum elements.

Rhodium

Rhodium was discovered by William H. Wollaston in 1803, London. It's symbol is Rh, and the origin of the name comes from the Greek word rhodon, meaning rose.

P: 45 E: 45 Average Atomic Mass: 102.9055 Atomic #: 45
Rhodium

Three cool facts about this element

  1. It is the rarest of all non-radioactive metals on the earth.
  2. It is a hard and durable metal with a high reflectance.
  3. It is not attacked by acids and is insoluble in nitric acid.