![[ATOM]](atom.gif) |
Manganese
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Information valid for Mn-55 unless otherwise noted
Basic Information
Symbol: Mn
Atomic Number: 25
Mass: 54.93805
Melting Point: 1245.0 C
Boiling Point: 1962.0 C
Number of Protons/Electrons: 25
Number of Neutrons: 30
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 7.43 g/cm3
Color: silverish/grayish
Atomic Structure
![[Bohr Model of Manganese]](b0025.gif) |
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Number of Energy Levels: 4
First Energy Level: 2
Second Energy Level: 8
Third Energy Level: 13
Fourth Energy Level: 2
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Isotopes
| Isotope |
Half Life |
| Mn-52 |
5.59 days |
| Mn-52m |
21.1 minutes |
| Mn-53 |
3700000.0 years |
| Mn-54 |
312.2 days |
| Mn-55 |
Stable |
| Mn-56 |
2.57 hours |
| Mn-57 |
1.45 minutes |
Facts
Date of Discovery: 1774
Discoverer: Johann Gahn
Name Origin: From the Latin word mangnes (magnet)
Uses: steel, batteries, ceramics
Obtained From: pyrolusite, psilomelane, rhodochrosite