Manganese
Definition and meaning of Manganese in chemistry.
![Manganese element card: symbol Mn, atomic number 25, atomic mass 54.938, electron configuration [Ar] 3d⁵ 4s², oxidation states +7 +4 +2, Transition metal, group 7, period 4, solid at room temperature.](/assets/images/terms/manganese-chemical-element.webp)
Manganese is a hard, brittle, silvery transition metal with the symbol Mn and atomic number 25. It is frequently found in natural minerals directly alongside iron. This element serves as an essential material for heavy industry and a vital trace nutrient for biological health.
In more detail
Manganese sits in group 7 of the periodic table. It is a transition metal with a highly diverse chemical profile. It can exist in multiple different oxidation states, ranging from -3 all the way up to +7.
The most common and stable states are +2, +3, +4, +6, and +7. One famous form is the permanganate ion (MnO4-). This ion acts as a strong oxidizing agent.
This means it easily strips electrons away from other chemicals. Manganese is the twelfth most abundant element found in the Earth's crust. Miners primarily extract it from geological ores called pyrolusite and rhodochrosite.
The pure metal tarnishes slowly in regular air. However, it oxidizes very rapidly when heated. This rapid heating process forms a dark compound called manganese dioxide.
In biological systems, manganese acts as a vital trace nutrient. It functions as a critical cofactor, or helper molecule, for numerous important enzymes. One of these enzymes is manganese superoxide dismutase.
This specific enzyme carefully protects living cells from dangerous oxidative stress. However, breathing high levels of airborne manganese dust is toxic. Chronic occupational exposure causes a severe neurological condition called manganism. This tragic disease closely resembles Parkinson's disease.
Key facts
| Field | General Chemistry |
|---|---|
| Symbol | Mn |
| Atomic number | 25 |
| Atomic mass | 54.938 u |
| Category | Transition-Metal |
| Melting point | 1246 °C |
| Year discovered | 1774 |
Companies widely use a compound called manganese dioxide in standard dry-cell alkaline batteries. It acts as a necessary chemical depolarizer inside the battery cell. This important role safely prevents explosive hydrogen gas from accumulating while the battery continuously discharges its power.
Frequently asked questions
Why is manganese important for steel production?
Manganese is essential in steelmaking because it acts as a deoxidizer and desulfurizer. This action removes impurities and greatly improves the final alloy's strength.
What are the biological roles of manganese?
Manganese serves as a vital cofactor for many biological enzymes. These enzymes help manage metabolism, bone formation, and antioxidant defense mechanisms.
Related terms
Sources & references
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