ChemGlobe

Rhodium

Metalsolid
Symbol: Rh
Atomic number: 45
Atomic mass: 102.90550
Group: Transition Metal
CAS-number: 7440-16-6

Deutsch
Français
Español
Physical data
Isotopes
Other info
Navigation
Co
Cobalt
Ru Ruthenium To Periodic Table PalladiumPd
Iridium
Ir

Go to element

Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 18, 16, 1
Orbitals: [Kr] 4d8 5s1
Electronegativity: 2.2, 1.4
1. Ionization potential: 7.4589 eV
2. Ionization potential: 18.08 eV
3. Ionization potential: 31.06 eV
Oxidation states: 5, 4, 3, 1, 2, 0
Electrical conductivity: 0.211 10^6
Melting point: 1966 °C ±3
Boiling point: 3695 °C
Specific heat: 0.242 J/gK
Heat of fusion: 21.50 kJ/mol
Heat of vaporization: 493.0 kJ/mol
Thermal conductivity: 1.50 W/cmK
Atomic radius: 1.83 Å
Ionic radius: 0.67 Å (+3)
Covalent radius: 1.25 Å
Atomic volume: 8.3 cm³/mol
Density (293 K): 12.4 g/cm³
Crystal structure: cubic face centered
cubic face centered

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
101Rh 0 101 1/2 3.3y EC View
101Rhm 0 101 9/2 4.35d EC, IT View
102Rh 0 102 6 ~2.9y EC View
102Rhm 0 102 2 207d EC, β-, β+ View
103Rh 100 102.906 1/2 -- --
103Rhm 0 103 7/2 56.12m IT View
105Rh 0 105 7/2 35.36h β- View
105Rhm 0 105 1/2 40s IT View
106Rh 0 106 1 29.9s β- View

Other info

Name origin:Greek: rhodon (rose). Its salts give a rosy solution.
Description:Hard, silvery-white metal
Discovered by:William Wollaston
Year:1803
Place:England
Sources:Obtained as a by-product of nickel production.
Use(s):Used as a coating to prevent wear on high quality science equipment and with platinum to make thermocouples.