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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]
Number of Energy Levels: 4

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 13
    Fourth Energy Level: 2


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


Date of Discovery: 1774
Discoverer: Johann Gahn
Name Origin: From the Latin word mangnes (magnet)
Uses: steel, batteries, ceramics
Obtained From: pyrolusite, psilomelane, rhodochrosite