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Information valid for Au-197 unless otherwise noted

Basic Information

Symbol: Au
Atomic Number: 79
Mass: 196.96655
Melting Point: 1064.43 C
Boiling Point: 2807.0 C
Number of Protons/Electrons: 79
Number of Neutrons: 118
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 293 K: 19.32 g/cm3
Color: Gold

Atomic Structure

[Bohr Model of Gold]
Number of Energy Levels: 6

  1. First Energy Level: 2
    Second Energy Level: 8
    Third Energy Level: 18
    Fourth Energy Level: 32
    Fifth Energy Level: 18
    Sixth Energy Level: 1


Isotope Half Life
Au-194 1.6 days
Au-195 186.1 days
Au-195m 30.5 seconds
Au-196 6.2 days
Au-197 Stable
Au-198 2.7 days
Au-199 3.14 days


Date of Discovery: circa 3000 BC
Discoverer: Unknown
Name Origin: From the Old English word geolo (yellow)
Symbol Origin: From the Latin word aurum (gold)
Uses: electronics, jewelry, coins
Obtained From: crust of the earth, copper ores

Related Links

Note: The external links below are not a part of this site and their content is not the responsibility of this site

  1. World Gold Council