Precious Metal Elements Rh

Precious Metal Elements

Rhodium[  Atomic number45  Atomic weight102.9055  ]

When solidified, cannot be melted by anything. Very hard element used for plating to create hard surfaces.

I’m very interested in environmental issues. In fact, I hate atmospheric pollution! Use me for plating if you want a hard surface finish.

Rh Rhodium
Atomic number 45
Atomic weight 102.9055
Isotope 103Rh
Crystal Structure fcc
Metallicity Trans.Metal
Shell 2,8,18,16,1
Filling Orbital 4d8
Oxidation States 2,3,4
Atomic Radius Å 1.83
Covalent Radius Å 1.25
Atomic Volume cm3/mol 8.3
Density at 293K g/cm3 12.41
Melting Point 1963
Boiling Point 3697
Specific Heat J/gK 0.242
Heat of Fusion kJ/mol 21.50
Heat of Vaporization kJ/mol 493.0
Thermal Conductivity at 273K W/cmK 1.50
Specific Resistance at 273K 10-6 Ωcm 4.3
Coefficient of Linear expansion at 293K 10-6 K-1 8.2
Ionization Potential V 7.45890
2nd Ionization Potential V 18.08
Electron Affinity eV 1.137
Electronegativity 2.28
Discovery year 1803