Details : Item 215

Alkali metals
Alkaline earth metal
Transition metals I
Transition metals II
Transition metals III
Transition metals IV
Post-transition metal
Diatomic non-metal
Noble gas

Famille : Transition metals III/5
Symbol: Rh, phase: solid, silvery white metallic
One of the rarest and most valuable precious metals.
Used in automobiles as a catalytic converter. At levels
of 100 mg/m3, immediately dangerous to life and health.
Atomic number45
Atomic weight102.90550
Melting point (K)2237
Boiling point (K)3968
Speed of sound (m/s)4700
Discovery1804 (W. H. Wollaston)