Cadmium

(So named (Latin cadmia, "zinc ore") by Friedrich Strohmeyer, German chemist, because it is frequently found associated with zinc) A silver-white, malleable, ductile, metallic chemical element occurring as a sulfide or carbonate in zinc ores. It is used in some low-melting alloys, electroplating, rechargeable batteries, etc. It has highly toxic dust and fumes.

Symbol: Cd
Atomic number: 48
Atomic weight: 112.411
Density (at room temperature and pressure): 8.65 g/cc
Melting point: 321.07°C
Boiling point: 765°C
Valence: +2
Ground state electron configuration: [Kr]4d¹⁰5s²

Cadmium
Symbol: Cd
Atomic Number: 48
Atomic Weight: 112.41
Boiling Point: 1040 K
Melting Point: 594.26 K
Density at 300K: 8.65 g/cm³
Covalent radius: 1.14
Atomic radius: 1.71
Atomic volume: 13.10 cm³/mol
First ionization potental: 8.993 V
Specific heat capacity: 0.232 Jg^-1K^-1
Thermal conductivity: 96.8 Wm^-1K^-1
Electrical conductivity: 14.7 10⁶Ω^-1m^-1
Heat of fusion: 6.07 kJ/mol
Heat of vaporization: 99.87 kJ/mol
Electronegativity: 1.69 (Pauling's)

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Cad"mi*um (?), n. [NL. See Cadmia.] Chem.

A comparatively rare element related to zinc, and occurring in some zinc ores. It is a white metal, both ductile and malleable. Symbol Cd. Atomic weight 111.8. It was discovered by Stromeyer in 1817, who named it from its association with zinc or zinc ore.

Cadmium yellow, a compound of cadmium and sulphur, of an intense yellow color, used as a pigment.

 

© Webster 1913.