Chemical Elements.com - Gallium (Ga)

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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

Number of Energy Levels: 4

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

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

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