Relative atomic mass: 106.42 +- 0.01

English: Palladium
French: Palladium
Croatian: Paladij
German: Palladium
Italian: Palladio
Spanish: Paladio

Atomic number: 46
Group numbers: 10
Period: 5
Standard state (20 oC): solid

Discovery: 1803 William Hyde Wollaston (GB)
Palladium was discovered by William Hyde Wollaston (GB) in 1803. Named after the asteroid Pallas which was discovered at about the same time and from the Greek name Pallas, goddess of wisdom. It is a soft, malleable, ductile, silvery-white metal that resists corrosion, dissolves in oxidizing acids and absorbs hydrogen. Metal dust is combustible. Palladium is obtained with platinum, nickel, copper and mercury ores. It is used as a substitute for silver in dental items and jewellery. The pure metal is used as the delicate mainsprings in analog wristwatches. It is also used in surgical instruments and as a catalyst. The price of 99.8 % pure palladium granules is 622.00 for 25 g.
Electronic configuration: [Kr] 4d10
Formal oxidation number: +2 +3
Atomic radius: 137.6 pm

Electronegativities: 2.2
Thermal conductivity: 71.8 W/(m K)
Electrical resistivity (20 oC): 10.8 microOhm cm

Melting point: 1554.9 oC
Boiling point: 2963 oC

Heat of fusion: 17.2 kJ/mol
Heat of vaporization: 361.5 kJ/mol
Heat of atomization: 377.4 kJ/mol

45Rh <= 46Pd => 47Ag

ASCII Periodic Table of the Elements
29 Aug. 2017
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