45 Rh

Transition metal

Rhodium

Most expensive precious metal.

See it in the interactive periodic table

Properties of Rhodium

Atomic number (Z)
45
Symbol
Rh
Atomic mass
102.91 g/mol
Category
Transition metal
Group
9
Period
5
Electron configuration
[Kr] 4d⁸ 5s¹
Electronegativity (Pauling)
2.28
Atomic radius
173 pm
First ionization energy
720 kJ/mol
Melting point
2237 K (1963.8 °C)
Boiling point
3968 K (3694.8 °C)
Density
12.41 g/cm³
Phase at 25 °C
Solid
Discovered
Discovered in 1803
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