41
Nb
niobium
92.906

General properties

Group
group 5
Period
period 5
Category
transition metals
Standard atomic weight
92.906 37(1)
Melting point
2750 K (2477 °C)
Boiling point
5017 K (4744 °C)
Phase at STP
solid

Additional properties

Block
d-block
Electron configuration
[Kr] 4d⁴ 5s¹
Electrons per shell
2, 8, 18, 12, 1
Electronegativity
1.6
Density
8.57 g/cm³
Oxidation states
−3, −1, +1, +2, +3, +4, +5 (a mildly oxide)
CAS Number
7440-03-1