45
Rh
rhodium
102.91

General properties

Group
group 9
Period
period 5
Category
transition metals
Standard atomic weight
102.905 49(2)
Melting point
2237 K (1964 °C)
Boiling point
3968 K (3695 °C)
Phase at STP
solid

Additional properties

Block
d-block
Electron configuration
[Kr] 4d⁸ 5s¹
Electrons per shell
2, 8, 18, 16, 1
Electronegativity
2.28
Density
12.41 g/cm³
Oxidation states
−3, −1, 0, +1, +2, +3, +4, +5, +6 (an amphoteric oxide)
CAS Number
7440-16-6