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Atomic Number: 25
Atomic Weight: 54
Density:
43/7 gr/cm3
Hardness: 6
Color: grey-white
Streak: brown-black
Luster: metallic
Period:
4
Table Group:
7
Series:
transition meta
Manganese (Mn)
[Indexes Manganese (Mn)]
    Manganese is a chemical element in the periodic table that has the symbol Mn and atomic number 25. Remarks: Hard, brittle, silvery metal. Reactive when impure and will burn in oxygen. Surface oxidation occurs in air; will react with water, dissolves in dilute acids. Used in steel production, animal feed supplement, fertilizer additives, ceramics, etc. Diagnostic tests: With borax bead test, manganese gives a bead color violet-red in oxidizing flame and colorless in reducing flame. With soda (Na2CO3) and an oxidizing flame the bead color is bluish green. These bead tests are very sensitive and may be relied on even with the presence of other metals. In solution, color varies from light pink (Mn2+) to deep violet (Mn7+) depending on oxidation state. Mn2+ is soluble in (NH4)OH, forms a peach-tan precipitate using (NH4)2S. The addition of NaOH to Mn2+ forms a brown precipitate of Mn(OH)2 which turns black (Mn(OH)3)on the addition of H2O2.
 
  Biology & Environmental effects  General Properties of Manganese[1Page More]
  Investigating the status of Manganese in Iran & World
  
 
Biology & Environmental effects
 
  Biology   Environmental effects
 
 
General Properties of Manganese
 
  Composing minerals   History
  Properties of Manganese
 
 
Investigating the status of Manganese in Iran & World
 
  Production of Manganese   Significant consumptions of Manganese
  The exploration, extraction & mineral- processing methods of Manganese
 
 
 
 
 
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