Gold

Statistics:

• Name: Gold
• Symbol: Au
• Classification: Transition Metal
• Atomic Number: 79
• Atomic Mass: 196.966569 g/mol
• Density: 19.32 g/cm³
• Melting: 1064.4°C
• Boiling: 2940°C
• Protons & Electrons:79
• Neutrons:118
• Discovered: prehistoric
• Discovered By: unknown
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Electrons Per Energy Level:

• Level 1: 2
• Level 2: 8
• Level 3: 18
• Level 4: 32
• Level 5: 18
• Level 6: 1

Isotopes:

Isotope: Half-life

• ¹⁹⁴Au: 38.02 hours
• ¹⁹⁵Au: 186.09 days
• ^195m1Au: 30.5 seconds
• ¹⁹⁶Au: 6.183 days
• ¹⁹⁷Au: stable
• ¹⁹⁸Au: 2.69517 days
• ¹⁹⁹Au: 3.139 days

Brief Summary

Gold is a Transition Metal with the symbol 'Au' and contains 79 Protons & Electrons with 118 neutrons in the nucleus of the atom. Gold has an atomic mass of 196.966569 g/mol and, at a temperature of 20°C, has a density of 19.32 g/cm³. It will melt at a temperature of 1064.4°C and boil at 2940°C.

Gold has been known since prehistoric times and is named 'Gold' Old English word "geolo" meaning "yellow".

Some common usages for Gold: electronics, jewelry, coins.

Definitions and Notes

Density listed is at a temperature of 20°C.

Isotopes are forms of an element who have the same atomic number but different mass because they contain different number of neutrons.

Half-life is the time required for a quantity of a subject to fall to half of its current quantity.

MLA Citing Format

Gold :: Au :: 79 - Chemical Element. 22 Nov. 2008 <http://www.chemicalelement.com/element/gold.html>.