46
106.42
Pd
Palladium
Identification
CAS Number: 7440-05-3
Discovery Year: 1803
Discoverer: William Wollaston
Discovery Location: England
Properties
Atomic Dimensions
Atomic Radius: 140 pm →
Atomic Radius (Rahm): 215 pm
Covalent Radius: 139 pm →Van der Waals Radius: 210 pm
Metallic Radius: 128 pm
Atomic Volume: 8.9 cm³/mol
Lattice Constant: 3.89 Å
Thermodynamics
Electronic Structure
Electron Config: [Kr] 4d10
Block: d
Period: 5 →Group: 10 →Electronegativity: 2.2 →Electron Affinity: 0.562 eV →Oxidation States: +2, +4
Abundance & Geochemistry
Crust Abundance: 0.015 mg/kg
Geochemical Class: noble metal
Goldschmidt Class: siderophile
About
Soft white ductile transition element. Found with some copper and nickel ores. Does not react with oxygen at normal temperatures. Dissolves slowly in hydrochloric acid. Discovered in 1803 by W.H. Wollaston.
Isotopes
Pd-106 106 27.33%
Pd-108 108 26.46%
Pd-105 105 22.33%
Pd-110 110 11.72%
Pd-104 104 11.14%
Pd-102 102 1.02%
