PERIODIC ELEMENT
Au (Gold)




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Atomic number : 79
Atomic mass : 196.9655 g.mol-1
Electronegativity according to Pauling : 2.4
Density : 19.3 g.cm-3 at 20 °C
Melting point : 1062 °C
Boiling point : 2000 °C
Vanderwaals radius : 0.144 nm
Ionic radius : 0.137 nm (+4)
Isotopes : 7
Electronic shell : [Xe] 4f14 5d10 6s1
Energy of first ionisation : 888 kJ.mol-1
Energy of second ionisation :1974.6 kJ.mol-1
Standard potential :+1.68 V (Au+ / Au)
Discovered by : c.a. 3000 BC
 
Atomic Structure Uses (electronics, jewelry, coins)