Gallium at Chemical Elements.com 


 

Basic Information


Name: Gallium
Symbol: Ga
Atomic Number: 31
Atomic Mass: 69.723 amu
Melting Point: 29.78 °C (302.93 °K, 85.604004 °F)
Boiling Point: 2403.0 °C (2676.15 °K, 4357.4 °F)
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

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

Isotopes

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

Facts


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