Discovered By: William Hyde Wollaston
Discovery year: 1803

The following table showing some properties of Rhodium(Rh):

Table Example
Atomic number 45
Group 9
Period 5
Block d
Electrons 45
Protos 45
Neutrons 58
Atomic weight 102.9055
Oxidation states -1 +2, +3, +4
Ionic charge Rh^3+


Table Example
Electrons per shell K2 L8 M18 N16 O1
Electron configuration 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^1 4d^8
Atomic radius 173 pm
Covalent radius 142 pm
Boiling point 3695°C
Melting point 1964°C
Phase Solid
Fusion heat 21.7 kJ.mol^-1
Vaporization heat 495 kJ.mol^-1
Therml expansion 8.2*10^-6 K^-1


Table Example
Color Silver
Brinell hardness 1100 MPa
Bulk modulus 380 GPa
Density 12450 kg.m^-3
Liquid density 10700 kg.m^-3
Mohs hardness 6
Molar volume 8.2655*10^-6 m^3.mol^-1
Poisson ratio 0.26
Shear modulus 150 GPa
Sound speed 4700 m.s^-1


Table Example
Vickers hardness 1246 MPa
Young's modulus 275 GPa
Electrical conductivity 2.3*10^7 S.m^-1
Electrical type Conductor
Magnetic type Paramagnetic
Volume magnetic susceptibility 1.693*10^-4
Resistivity 4.3*10^-8 Ohm.m
Electronegativity 2.28
Valence 6
Radioactive No
Neutron cross section 145 barn