43
Tc
Technetium
98.9063 | 2
8
18
13
2
|
43
Tc
Technetium
98.9063 | 2
8
18
13
2
|
| General |
|---|
| Name | Technetium | | Symbol | Tc | | Number | 43 | | Chemical series | Transition elements | | Group / Period | 7 / 5 | | Block | d-block | | CAS registry number | 7440-26-8 |
| Physical properties |
|---|
| State | solid | | Density | 11.5 g/cm3 | | Melting point | 2430 K (2157°C, 3915°F) | | Boiling point | 4538 K (4265 °C, 7709 °F) | | Critical point | |
| Atomic properties |
|---|
| Atomic Weight | 98.9063 g/mol | | Crystal structure | hexagonal | | Electronegativity | 1.90 | | Atomic radius | 135 pm | | Atomic radius (calculated) | 183 pm | | Electron configuration | [Kr] 4d5 5s2 | | Electrons per shell | 2, 8, 18, 13, 2 | | Number of protons | 43 | | Number of neutrons | 55 |
|
Ruthenium