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Information valid for Ga-70 unless otherwise noted

Basic Information

Symbol: Ga
Atomic Number: 31
Mass: 69.723
Melting Point: 29.78 C
Boiling Point: 2403.0 C
Number of Protons/Electrons: 31
Number of Neutrons: 39
Classification: Other Metals
Crystal Structure: Orthorhombic
Density @ 293 K: 5.907 g/cm3
Color: White/Silver

Atomic Structure

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

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 3


Isotope Half Life
Ga-66 9.5 hours
Ga-67 3.3 days
Ga-68 1.1 hours
Ga-69 Stable
Ga-71 Stable
Ga-72 14.1 hours


Date of Discovery: 1875
Discoverer: Paul Emile Lecoq de Boisbaudran
Name Origin: From the Latin word Gallia, the old name of France
Uses: semiconductor production
Obtained From: bauxite, germanite, coal