PERIODIC ELEMENT
Pt (Platinum)




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Atomic number : 78
Atomic mass : 195.09 g.mol-1
Electronegativity according to Pauling : 2.2
Density : 214 g.cm-3 at 20 °C
Melting point : 1772 °C
Boiling point : 3800 °C
Vanderwaals radius : 0.138 nm
Ionic radius : 0.096 nm (+4)
Isotopes : 13
Electronic shell : [Xe] 4f14 5d9 6s1
Energy of first ionisation : 867 kJ.mol-1
Energy of second ionisation :1788 kJ.mol-1
Discovered by : Julius Scaliger in 1735
 
Atomic Structure Uses (jewelry, containers, catalyst)