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Basic Information
Name: Manganese
Symbol: Mn
Atomic Number: 25
Atomic Mass: 54.93805 amu
Melting Point: 1245.0 °C (1518.15 °K, 2273.0 °F)
Boiling Point: 1962.0 °C (2235.15 °K, 3563.6 °F)
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]](Chemical Elements_com - Manganese (Mn)_files/b0025.gif) |
Number of Energy Levels: 4 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 13 Fourth Energy Level: 2 |
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