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Element 46 - Palladium (Pd) sound

After the asteroid Pallas; discovered 1803. Free from tarnish and corrosion resistant, palladium is incorporated in contacts for telephone relays and high-grade surgical instruments. It is also used with gold, silver, and other metals as a "stiffener" in dental inlays and bridgework.

Properties

Atomic Number: 46
Atomic Weight: 106.42
Electron Configuration (at ground state): 1s22s22p63s23p63d104s24p64d10
Oxidation States (Bold most stable): +2, +4
Boiling Point (K): 3240
Melting Point (K): 1825
Density (at 300K -- g/cm3): 12.0
Atomic Volume (at 300K -- cm3/mol) 8.90
Number of stable isotopes: 6
Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type: 103 -- 17.0 days -- orbital electron capture
107 -- 7 x 106 years -- beta particle (electron) emission
Covalent Radius (Å): 1.28
Atomic Radius (Å): 1.37
First Ionization Potential (V): 8.34
Electronegativity (Pauling's): 2.20
Specific Heat Capacity (at 300K -- J g-1 K-1): 0.244
Heat of Vaporization (kJ/mol): 393.3
Heat of Fusion (kJ/mol): 16.74
Electrical Conductivity (at 293K for polycrystalline material -- 106 (ohms)-1 cm-1): 10.0
Thermal Conductivity (at 300K -- W m-1 K-1): 71.8
Crystal Structure: Cubic, face centered
Acid-Base Properties: Very basic