Palladium

Images

Image

Attribution: images-of-elements.com

Animated Palladium

History

Palladium was named after the asteroid Pallas, which was discovered at about the same time. Pallas was the Greek goddess of wisdom.

Sources

Discovered in 1803 by Wollaston, Palladium is found with platinum and other metals of the platinum group in placer deposits of Russia, South America, North America, Ethiopia, and Australia. It is also found associated with the nickel-copper deposits of South Africa and Ontario. Palladium's separation from the platinum metals depends upon the type of ore in which it is found.

Uses

Finely divided palladium is a good catalyst and is used for hydrogenation and dehydrogenation reactions. It is alloyed and used in jewelry trades.

White gold is an alloy of gold decolorized by the addition of palladium. Like gold, palladium can be beaten into leaf as thin as 1/250,000 in. The metal is used in dentistry, watch making, and in making surgical instruments and electrical contacts.

General Info

AtomicNumber
46
Symbol
Pd
Name
Palladium

Atomic Info

Appearance
AtomicWeight
106.42(1)
Color
6985
ElectronicConfiguration
[Kr] 4d10
ElectronegativityInPauling
2.2
AtomicRadiusInPM
131
IonRadiusInPM
59 (+1)
VanDerWaalsRadiusInPM
163
IEinKJmol
804
EAinKJmol
-54
OxidationStates
2, 4
StandardState
solid
BondingType
metallic
MeltingPoint
1828
BoilingPoint
3236
Density
12.02
State
Transition metal
DiscoveredYear
1803