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Palladium (₄₆Pd^106.42)
[7440-05-3]

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Elemental Form


An element belonging to the platinum group of metals, palladium is steel-white in color, except in powder form, when it appears black. Palladium resists tarnishing in air and, if annealed, it is soft and ductile. Palladium has the lowest density and melting point of the palladium metals and is the most reactive. At room temperature, palladium absorbs up to 900 times its own volume of hydrogen.
Melting Point	1554.9°C	Boiling Point	3167°C
Density	12.02g/cm³	Themal Conductivity @ 18°C	1.68cal/cm²/cm/s/°C
Specific Heat @ 0°C	0.058cal/g°C	Heat of Fusion	4.0k-cal/g-atom
Heat of Vaporization	90k-cal/g-atom	Atomic Volume	8.9W/D
First Ionization Energy	192K-cal/g-mole	Electronegativity	2.2Pauling's
Covalent Radius	1.28Angstroms	Vickers Hardness (annealed)	37-39
Linear Coefficient of Expansion	11.6x10^-6K^-1	Electrical Resistivity @ 20°C	9.93µΩ-cm
Crystal Structure	Cubic, face centered	Work Function	4.99eV
Vapor Pressure @ M.P.	26mmHg	Poisson Ratio	0.39
Young's Modulus of Elasticity	17x10⁶psi	Magnetic Susceptibility	5.8x10^-6cgs
Tensile Strength (annealed)	33,000psi