43
Tc
technetium
[97]

General properties

Group
group 7
Period
period 5
Category
transition metals
Standard atomic weight
-
Melting point
2430 K (2157 °C)
Boiling point
4538 K (4265 °C)
Phase at STP
solid

Additional properties

Block
d-block
Electron configuration
[Kr] 4d⁵ 5s²
Electrons per shell
2, 8, 18, 13, 2
Electronegativity
1.9
Density
11 g/cm³
Oxidation states
−3, −1, 0, +1, +2, +3, +4, +5, +6, +7 (a strongly oxide)
CAS Number
7440-26-8