Mn | Z = 25 | ◊ ◊ ◊ ◊ ◊ |
Manganese | |
From the Greek "Magnhsia", meaning "Magnesia" | ||||
(AM) Atomic Mass | 54.938 amu | ♦ | ![]() |
+2, +3, +4, +7 |
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1962  °C | ♦ | ![]() |
1244 °C |
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7.3 g/cm3 | ♦ | ![]() |
Cubic |
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1.5 | ♦ | ![]() |
1.39  Å |
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Solid | ♦ | (C) Heat Capacity | 0.479 J/g °C |
Electronic-Config | [Ar]  3d5  4s2  | ♦ | ![]() |
717.37 kJ/mol |
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221 kJ/mol | ♦ | ![]() |
12.91 kJ/mol |
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1774 | ♦ | ![]() |
Sweden |
(E°) Standard Potential | Mn2+⇔ Mn (-1.185 V) | |||
Stable isotopes |  55Mn | |||
Discovered/Synthesized by | Johan Gottlieb Gahn | |||
Natural Source | The mineral/ore hausmannite, pyrolusite, braunite, manganite, rhodochrosite, deep sea Mn nodules | |||
Common Uses | Hard tough steel, earthmovers, rock crushers, rails, plows, axes, batteries, fertilizer | |||
Other Info | Plays a crucial role in photosynthesis Our bodies can't store it |
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