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08-Oct-2013
About Gold

Basic Information:

Name: Gold
Symbol: Au
Atomic Number: 79
Atomic Mass: 196.96655 amu
Melting Point: 1064.43 °C
Boiling Point: 2807 °C
Number of Protons/Electrons: 79
Number of Neutrons: 118
Classification: Transition Metal
Crystal Structure: Cubic
Density @ 19.85 °C : 19.32 g/cm3
Color: Golden

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:

Year of Discovery: Circa 3000 BC
Name Origin: From the Old English word Geolo (yellow)
Symbol Origin: From the Latin word Aurum (Gold)
Uses: Jewellery, Electronics
Obtained From: Crust of the Earth, Copper ores

 
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