Palladium

Palladium is a member of the platinum group of metals. It is silvery white in colour, is malleable and ductile, and is one of the most reactive in the group. It has an abundance of 6x10-6 in the earth’s crust. Palladium has good corrosion resistance but is soluble in oxidising acids and fused alkalis. It readily absorbs hydrogen gas (up to 900 times its own volume), but its main use is as a catalyst for hydrogenation. Palladium is also used within the electronics industry and in some dental applications.


Symbol
Pd

Discovered
1803 by W.H. Woollaston in London, England.

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Atomic number 46 Clip
Atomic / Molecular Weight 106.42 gmol-1Clip
Density 11995 kgm-3Clip
Crystal Structure fcc Clip
Lattice constant 389 fmClip
Melting Point 1827 KClip
Boiling Point 3273 KClip
Linear expansivity 0.0000118 K-1Clip
Specific heat capacity 243 Jkg-1K-1Clip
Thermal conductivity 72 Wm-1K-1Clip
Bulk Modulus of Rigidity 182000000000 Nm-2Clip
Electromotive Series -0.83 VClip
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See also: Periodic Table, Platinum, Wollaston, William Hyde.

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Subjects: Chemistry