Symbol Mn
Atomic Number 25
Atomic Mass 54.9380 g.mol -1
Discovered by Johan Gottlieb Gahn

Chemical Properties Of Manganese

Group 7 Melting point 1246°C, 2275°F, 1519 K
Period 4 Boiling point 2061°C, 3742°F, 2334 K
Block d Density (g cm−3) 7.3  
Atomic number 25 Relative atomic mass 54.938
State at 20°C Solid Key isotopes 55Mn
Electron configuration [Ar] 3d54s2 CAS number 7439-96-5
ChemSpider ID 22372 ChemSpider is a free chemical structure database

What is Manganese?

  • Manganese, a chemical element that has a symbol Mn and atomic number 25.
  • This element is not found as a free element in nature but available in combination with iron and other minerals.
  • It is a metal that has important metal alloy uses and particularly in stainless steel.

Uses Of Manganese

  • Manganese is used to produce a variety of important alloys and to deoxidize steel and desulfurize.
  • It is also used in dry cell batteries.
  • Manganese is used as a black-brown pigment in paint.
  • It is an essential trace element for living creatures.
  • It is mainly used to decolorize glass and to prepare violet colored glass.
  • Steel contains 1% manganese to increase the strength and improve the workability.
  • Manganese steel has 13% manganese which is very strong and used for railway tracks, rifle barrels, safes and prison bars.
  • Drink cans are made from an alloy of aluminum that contains 1.5% manganese, improving the resistance to corrosion.
  • Manganese is also used as a catalyst, decolorize the glass that is colored green by iron impurities.
  • Manganese sulfate is used to make a fungicide.

Properties Of Manganese

  • Manganese is a gray-white, hard and very brittle metal.
  • It tarnished on exposure to air and oxidized to manganese when heated.

Certain Facts About Manganese

  • Manganese is more reactive when available in pure form, and as a powder, it will burn in oxygen to react with water and dissolves in dilute acids.

Practise This Question

Aspirin is also known as [CPMT 1989, 94; MP PET 1995]