| Mn | Manganese |
Atomic number : 25
Relative atomic mass (12C = 12.0000) : 54.93805 |
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| P H Y S I C A L D A T A | |
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Group 7 transition metal Density / kg m-3 : 7440 (  ) [293 K]; 6430 [liquid at m.p.] |
Melting point / K : 1517 Boiling point / K : 2235 |
| D I S C O V E R Y | |
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Isolated in 1744 by J.G. Gahn at Stockholm, Sweden. |
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| G E O L O G I C A L D A T A | |
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Abundances Sun (relative to H = 1 × 1012) : 2.63 × 105 Earth's crust / p.p.m. : 950 Residence time / years : 50 Classification : scavenged Oxidation state : II |
Seawater / p.p.m. : Atlantic surface : 1.0 × 10-4 Atlantic deep : 0.96 × 10-4 Pacific surface : 1.0 × 10-4 Pacific deep : 0.4 × 10-4 |
| B I O L O G I C A L D A T A | |
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Level in humans Blood / mg dm-3 : 0.0016 - 0.075 Bone / p.p.m. : 0.2 - 100 Liver / p.p.m. : 3.6 - 9.6 Muscle / p.p.m. : 0.2 - 2.3 |
Daily dietary intake : 0.4 - 10 mg Total mass of element in average (70 kg) person : 12 mg |
