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Metal > PlatinumPt - Platinum This precious transition metal has been used since antiquity in South America. Spanish soldiers introduced the metal to Europe in 1750. Platinum wires and electrodes are used by our students. Atomic number - 78 Density g/mL 21 .4 Atomic weight u 195 .09 Melting point K 2045 Bonding radius A 1 .3 Boiling point K 4100 Atomic radius A 1 .83 Heat of vaporization kJ/mol 510 Ionization Potential V 9 Heat of fusion kJ/mol 19 .6 Electronegativity - 2 .28 Specific heat J/gK 0 .13 The oxide is mildly basic. Crystal are face centered cubic. Electron config. : [Xe] 4f14 5d9 6s1
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