Relative atomic mass: 196.966569 +- 0.000004

English: Gold
French: Or
Croatian: Zlato
German: Gold
Italian: Oro
Spanish: Oro

Atomic number: 79
Group numbers: 11
Period: 6
Standard state (20 oC): solid

Discovery: - -
Gold has been known since ancient times. The origin of the name comes from the Latin word aurum meaning gold. It is a soft, malleable, bright yellow metal that is unaffected by air, water, alkalis and most acids. Gold is found in veins in the crust, with copper ore and native. It is used in electronics, jewellery and coins. It is a good reflector of infrared radiation, so a thin film of gold is applied to the glass of skyscrapers to reduce internal heating from sunlight. The price of 99.99 % pure gold grain is 1652.50 for 25 g.
Electronic configuration: [Xe] 4f14 5d10 6s1
Formal oxidation number: +1 +3
Atomic radius: 144.2 pm

Electronegativities: 2.4
Thermal conductivity: 317 W/(m K)
Electrical resistivity (20 oC): 2.35 microOhm cm

Melting point: 1064.18 oC
Boiling point: 2856 oC

Heat of fusion: 12.7 kJ/mol
Heat of vaporization: 343.1 kJ/mol
Heat of atomization: 365.93 kJ/mol

78Pt <= 79Au => 80Hg

ASCII Periodic Table of the Elements
29 Aug. 2017
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