Rhodium was discovered by English chemist and physicist William Hyde Wollaston (1766-1828) in about 1803. The origin of the name comes from the Greek word rhodon meaning rose.
Name: Rhodium Symbol: Rh Atomic number: 45 Atomic weight: 102.91 State: solid Group, period, block: 9, 5, d Color: silvery white metallic Classification: transition metal Electron configuration: 4s1 4d8
Density: 12.41 g/cm-3 Melting point: 2237 K,1964 °C,3567 °F Boiling point: 3968 K,3695 °C,6683 °F
Oxidation states: 6, 5, 4, 3, 2, 1, -1 Electronegativity: 2.28 (Pauling scale) Ionization energies: 1st: 719.7 kJ·mol-1 Covalent radius: 142±7 pm Van der Waals radius: no data
There is one naturally occurring isotope of rhodium exists, 103Rh.