Mn | Z = 25 | ◊ ◊ ◊ ◊ ◊ |
Manganese | |
From the Greek "Magnhsia", meaning "Magnesia" | ||||
(AM) Atomic Mass | 54.938 amu | ♦ | Oxidation States | +2, +3, +4, +7 |
(BP) Boiling Point | 1962  °C | ♦ | (MP) Melting Point | 1244 °C |
(ρ) Density | 7.3 g/cm3 | ♦ | Crystal Structure | Cubic |
( χ ) Electronegativity | 1.5 | ♦ | (AR) Atomic Radius | 1.39  Å |
Physical State | Solid | ♦ | (C) Heat Capacity | 0.479 J/g °C |
Electronic-Config | [Ar]  3d5  4s2  | ♦ | (I1) First Ionization E | 717.37 kJ/mol |
(ΔHvap) Heat of Vaporization | 221 kJ/mol | ♦ | (ΔHfus) Heat of Fusion | 12.91 kJ/mol |
Year of Discovery | 1774 | ♦ | Location of Discovery | 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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