45 Rh 102.906 Rhodium Transition metal

The most expensive precious metal on Earth by weight, and the reason your car's exhaust is not toxic.

Atomic number
45
Atomic mass
102.906 u
Phase
Solid
Electron configuration
[Kr] 4d⁸ 5s¹
Melting point
2,237 K · 1,963.9 °C
Boiling point
3,968 K · 3,694.9 °C
Density
12.41 g/cm³
Electronegativity
2.28
Period / Group
5 / 9
Discovery year
1803
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