Manganese

Manganese
Manganese
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

Which of the following is not correct?
Organometallics can play an ever expanding role in the production of