Atomic number:78

Group numbers:10

Period:6

Electronic configuration:[Xe] 4f¹⁴ 5d⁹ 6s¹

Formal oxidation number:+2 +4

Electronegativities:2.2

Atomic radius / pm:137.3

Relative atomic mass:195.084 ± 0.009

 

Platinum was discovered by Julius Caesar Scaliger (IT) in 1557. The origin of the name comes from the Spanish word platina meaning silver. It is a rare, very heavy, soft, silvery-white metal that resists oxygen, water, corrosion, and acid attacks except aqua regia. Platinum is produced from deposits of native, or elemental. It is used in jewellery, to make crucible and special containers and as a catalyst. Platinum is used with cobalt to produce very strong magnets, also to make standard weights and measures.

Density / g dm^-3:21450 (293 K)

Molar volume / cm³mol^-1:9.09 (293 K)

Electrical resistivity / μΩcm:10.6 (20 °C)

Thermal conductivity / W m^-1K^-1:71.6

Melting point / °C:1768.4

Boiling point / °C:3825

Heat of fusion / kJ mol^-1:19.7

Heat of vaporization / kJ mol^-1:469

Heat of atomization / kJ mol^-1:564.42

1st ionization energy / kJ mol^-1:864.39

2nd ionization energy / kJ mol^-1:1791.07

3rd ionization energy / kJ mol^-1:-

in the atmosphere / ppm:-

in the Earth's crust / ppm:0.01

in the oceans / ppm:-