65
Tb
terbium
158.93

General properties

Group
n/a
Period
period 6
Category
lanthanoids
Standard atomic weight
158.925 354(8)
Melting point
1629 K (1356 °C)
Boiling point
3396 K (3123 °C)
Phase at STP
solid

Additional properties

Block
f-block
Electron configuration
[Xe] 4f⁹ 6s²
Electrons per shell
2, 8, 18, 27, 8, 2
Electronegativity
1.1
Density
8.23 g/cm³
Oxidation states
0, +1, +2, +3, +4 (a weakly basic oxide)
CAS Number
7440-27-9