Atomic number: 25

Symbol: Mn

Category: transition metal

Density at 25°C: solid  7.21 g·cm−3

Although important in industrial uses such as stainless steel, it is also essential in trace amounts as part of living organisms in dealing with oxygen. They also form as nodules at the bottom of the ocean taking a very long time to form.

Sample chip of manganese. image adapted from wikipedia

Use, natural applications or common combinations: 

  • In life processes
  • rust corrosion protection
  • In 1978 they estimated that 500 billion tons of manganese is found as nodules on the ocean floor.

Basic characteristics:

  • Standard atomic weight: 54.938 045(5)
  • Melting point: 1246 °C
  • Boiling point: 2061 °C
  • Radioactivity:  almost all stable naturally