Pd
Palladium
Transition MetalAtomic Number: 46 • Atomic Mass: 106.4200 u • Period: 5 • Group: 10
Electron Configuration: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d¹⁰
Phase: Solid
Electronegativity: 2.2
Physical & Chemical Properties
Physical Properties
- •Silvery-white, soft, ductile metal
- •Lowest melting point and density of platinum group metals
- •Good conductor of electricity and heat
- •Does not tarnish in air
- •Can absorb up to 900 times its volume in hydrogen
Melting Point
1828.05 K (1554.90 °C, 2830.82 °F)
Boiling Point
3236 K (2962.85 °C, 5365.13 °F)
Density
12.02 g/cm³
Electronegativity
2.2 (Pauling scale)
Chemical Properties
- •Multiple oxidation states from 0 to +4, with +2 being most common
- •Resistant to corrosion in air
- •Dissolves slowly in strong acids
- •Excellent catalyst even at low temperatures
- •Forms many complexes and organometallic compounds
Electron Configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 4d¹⁰Electron configuration describes how electrons are distributed in atomic orbitals, showing how they are arranged in energy levels and subshells.