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Basic Information

Name: Gold
Symbol: Au
Atomic Number: 79
Atomic Mass: 196.96655 amu
Melting Point: 1064.43 °C (1337.5801 K, 1947.9741 °F)
Boiling Point: 2807.0 °C (3080.15 K, 5084.6 °F)
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

Number of Energy Levels: 6

First Energy Level:

Second Energy Level:

Third Energy Level:

Fourth Energy Level:

Fifth Energy Level:

Sixth Energy Level:

Isotopes

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

Facts

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

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