Rhodium

Rhodium 102.90550(2)   Rh 45 1s22s22p63s23p63d104s2 4p64d85s1 [ ? ] Transition metal: Properties: Silvery-white metal Hazard: Rhodium fumes and dust may cause respiratory irritation.

Rhodium is a chemical element, having the chemical symbol Rh. Its atomic number (the number of protons) is 45. It has a standard atomic weight of 102.9055 g•mol ⁻¹ and is a solid in its elemental form.

Rhodium is considered to be a member of the "Transition metal" class of elements. At a pressure of 101.325 kPa, it has a boiling point of 3,695 °C and a melting point of 1,964 °C.