|Name: manganese||Group number: 7|
|Symbol: Mn||Group name: (none)|
|Atomic number: 25||Period number: 4|
|Atomic weight: 54.938049 (9)||Block: d-block|
|CAS Registry ID: 7439-96-5||Voice: |
|Standard state: solid at 298 K||Colour: silvery metallic|
|Classification: Metallic||Availability: |
Image adapted with permission from Prof James Marshall"s (U. North Texas, USA) Walking Tour of the elements CD.
The metal is gray-white, resembling iron, but is harder and very brittle. The metal is reactive chemically, and decomposes cold water slowly. Manganese is widely distributed throughout the animal kingdom. It is an important trace element and may be essential for utilisation of vitamin B. Manganese is present in quantity the floor of oceans. It is an important component of steel.
Nearing Zero cartoon included by kind permission of Nick Kim.
IsolationHere is a brief summary of the isolation of manganese.
It is not normally necessary to make manganese in the laboratory as it is available commercially. Nearly all manganese produced commercially is used in the steel industry as ferromanganese. This made by the reduction of iron oxide, Fe2O3, and managanese dioxide, MnO2, in appropriate proportions with carbon (as coke) in a blast furnace. Pure manganese is available through the electrolysis of manganese sulphate, MnSO4,