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Information valid for Ge-73 unless otherwise noted

Basic Information

Symbol: Ge
Atomic Number: 32
Mass: 72.61
Melting Point: 937.4 C
Boiling Point: 2830.0 C
Number of Protons/Electrons: 32
Number of Neutrons: 41
Classification: Metalloid
Crystal Structure: Cubic
Density @ 293 K: 5.323 g/cm3
Color: grayish

Atomic Structure

[Bohr Model of Germanium]
Number of Energy Levels: 4

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 4


Isotope Half Life
Ge-68 270.8 days
Ge-69 1.6 days
Ge-70 Stable
Ge-71 11.4 days
Ge-72 Stable
Ge-73 Stable
Ge-74 Stable
Ge-76 Stable
Ge-77 11.3 hours


Date of Discovery: 1886
Discoverer: Clemens Winkler
Name Origin: From the Latin word Germania, meaning Germany
Uses: semiconductors
Obtained From: refining of copper, zinc, lead