Relative atomic mass: 195.084 +- 0.009

English: Platinum
French: Platine
Croatian: Platina
German: Platin
Italian: Platino
Spanish: Platino

Atomic number: 78
Group numbers: 10
Period: 6
Standard state (20 oC): solid

Discovery: 1557 Julius Caesar Scaliger (IT)
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. The price of 99.9 % pure platinum shot is 464.80 for 5 g.
Electronic configuration: [Xe] 4f14 5d9 6s1
Formal oxidation number: +2 +4
Atomic radius: 137.3 pm

Electronegativities: 2.2
Thermal conductivity: 71.6 W/(m K)
Electrical resistivity (20 oC): 10.6 microOhm cm

Melting point: 1768.4 oC
Boiling point: 3825 oC

Heat of fusion: 19.7 kJ/mol
Heat of vaporization: 469 kJ/mol
Heat of atomization: 564.42 kJ/mol

77Ir <= 78Pt => 79Au

ASCII Periodic Table of the Elements
29 Aug. 2017
Copyright © 1998-2017 by Eni Generalic.