Physical Properties

The jagged surface of platinum

·         Colour: Light grey-white.
·         Looks likes silver, iron and sperrylite.
·         Malleable and ductile.
·         Lustre: Metallic.
·         Fracture: Sharp, jagged surfaces.
·         Cleavage: None.
·         Magnetic alloy with cobalt.
·         Insoluble in water.
·         Soluble in aqua regia.
·         Hardness: 4-4.5 mohs. (10 = diamond).
·         Density as solid: 21.37g/cm3. As crystal:
           21.5g/cm3.
·         Crystalline form: Silver metal, cubic.
·         Melting point: 1772°C
·         Boiling point: 3827°C

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Chemical Properties

·         Electron shells: 2, 8, 18, 32, 17, 1.
·         Electron configuration: 1s2 2s2 2p6 3s2 3p6 4s2
           3d10 4p6 5s2 4d10 5p6 6s1 4f14 5d9.
·         Shortened electron configuration: [Xe] 6s1 4f14
           5d9.
·         Electronegativity: 2.28.
·         Atomic weight: 195.09
·         Specific heat capacity: 0.13J/g*K
·         Heat of fusion: 4.7kJ/mol.
·         Heat of vaporization: 122kJ/mol.
·         Heat of atomization 564kJ/mol.
·         1st ionization energy: 870kJ/mol.
·         2nd ionization energy: 1791kJ/mol
·         Electron affinity: 205.3kJ/mol.
·         Minimum oxidation number: 0.
·         Minimum common oxidation number: 0.
·         Reaction with oxygen: None.
·         Oxide(s): Pt2O2.
·         Reacts with Cl above 400°C.
·         Hydrides: none.
·         Reaction with 3 M HNO3: None.
·         Reaction with 6 mols HCl: None.
·         Reaction with 6 mols NaOH: None.
·         Thermal conductivity: 71.6 W/m*K
·         Electrical conductivity: 9.4 x 106 S/m