Platinum

ElementPlatinumSymbolPt
Atomic Number78Molar Mass195.09 gmol-1
Electron Configuration[Xe]4f145d96s1Normal Statesolid metal
Density @STP21.45 g cm-3Melting Point1768oC
Boiling Point3825oCStable Isotopes190Pt, 192Pt, 194Pt, 195Pt, 196Pt, 198Pt
Atomic Radius139 pmIonic Radius85 (2+) pm
Electronegativity (Pauling)2.28Ionization Energy (1st)870 kJ mol-1
Ionization Energy (2nd)1791 kJ mol-1Ionization Energy (3rd)2800 kJ mol-1
Molar Heat Capacity25.9 J K-1mol-1Standard Molar Entropy41.6 J K-1mol-1
Enthalpy of Fusion19.7 kJ mol-1Enthalpy of Vapourization510.5 kJ mol-1
[Back to Periodic table] [ Home - www.gordonengland.co.uk]