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45Rh102.906
Rhodium
Transition MetalRhodium is a chemical element with symbol Rh and atomic number 45. It is a rare, silvery-white, hard, and chemically inert transition metal. It is a member of the platinum group.
Phase: SolidAppearance: silvery white metallic
2, 8, 18, 16, 1
Physical Properties
Atomic Mass102.905502 u
Density12.41 g/cm³
Melting Point2237 K
Boiling Point3968 K
Molar Heat24.98 J/(mol·K)
Period5
PhaseSolid
Chemical Properties
Electron Configuration1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s1 4d8
Semantic Config[Kr] 4d8 5s1
Shells2, 8, 18, 16, 1
Electron Affinity110.27 kJ/mol
Electronegativity2.28
Ionization Energies
IE1: 719.7 kJ/molIE2: 1740 kJ/molIE3: 2997 kJ/mol
Discovery
Discovered byWilliam Hyde Wollaston