Technetium
Technetium, 43Tc
 |
| General properties |
| Name, symbol
|
technetium, Tc |
| Pronunciation |
tek-NEE-shee-əm
|
| Appearance |
shiny gray metal |
|
| Technetium in the periodic table
|
|
|
| Atomic number (Z) |
43 |
|
Group, block
|
group 7, d-block
|
| Period |
period 5 |
| Element category |
transition metal
|
|
Standard atomic weight (Ar)
|
[98] |
| Electron configuration |
[Kr] 4d5 5s2
|
|
per shell
|
2, 8, 18, 13, 2 |
| Physical properties |
| Phase |
solid |
| Melting point |
2430 K (2157 °C, 3915 °F) |
| Boiling point |
4538 K (4265 °C, 7709 °F) |
|
Density near r.t.
|
11 g/cm3
|
| Heat of fusion |
33.29 kJ/mol
|
| Heat of vaporization |
585.2 kJ/mol |
| Molar heat capacity |
24.27 J/(mol·K) |
Vapor pressure (extrapolated)
|
P (Pa)
|
1 |
10 |
100 |
1 k |
10 k |
100 k |
| at Wikipedia
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