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 II/6
Symbol: Re, phase: solid, silvery-grayish. One of the
rarest elements in the Earth s crust, it is named after
the river Rhine in Europe. Among the most expensive of
metals, with an average price of US$2,750 per kg.
Atomic number75
Atomic weight186.207
Melting point (K)3459
Boiling point (K)5903
Speed of sound (m/s)4700
Discovery1908 (M. Ogawa)