Chemical Elements.com - Manganese (Mn)

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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

Number of Energy Levels: 4

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

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

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