Element Technetium
It is a chemical element with the symbol Tc and atomic number 43. Technetium atom is a manganese group element atom.
The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, and atomic number 43.
All technetium isotopes are radioactive. Technetium 99m (m=metastable) which is the decay product of Molybdenum 99, has a half-life of about 6 hours and is used diagnostically as a radioactive imaging agent.
Technetium 99 which is a decay product of technetium 99m, has a half-life of 210,000 years.
Names and Identifiers
| Chemical Formula: | Tc |
| CAS: | 7440-26-8 |
| Molecular Weight: | 98.00000g/mol |
| EC Number : | n/a |
| MDL Number: | n/a |
| Color: | silver-gray/silvery gray metallic |
| Other Names: | n/a |
| PubChem CID: | n/a |
| IUPAC Name: | Technetium |
| Inchl: | InChI=1S/Tc |
| InChI Key: | GKLVYJBZJHMRIY-UHFFFAOYSA-N |
| Canonical SMILES: | [Tc] |
| ICSC Number: | n/a |
Physical & Chemical Properties
| Phase: | Solid |
| Density: | 11 g/cm³ |
| Boiling Point: | 4538 K (4265 °C, 7709 °F) |
| Melting Point: | 2430 K (2157 °C, 3915 °F) |
| Molecular Formula: | Tc |
| Flash Point: | n/a |
| Exact Mass: | 97.90720 |
Technetium (43Tc) is the first of the two elements lighter than bismuth that have no stable isotopes; the other such element is promethium.
Radiosotope data
| Isotope | Mass/Da | Half-life | Mode of decay | Nuclear spin | Nuclear magnetic moment |
|---|---|---|---|---|---|
| 93Tc | 92.910248 | 2.73 h | EC to 93Mo | 9/2 | 6.26 |
| 94Tc | 93.909655 | 4.88 h | EC to 94Mo | 7 | 5.08 |
| 95Tc | 94.90766 | 20.0 h | EC to 95Mo | 9/2 | 5.89 |
| 96Tc | 95.90787 | 4.3 d | EC to 96Mo | 7 | 5.04 |
| 97Tc | 96.906364 | 2.6 x 106 y | EC to 97Mo | 9/2 | |
| 98Tc | 97.907215 (4) | 4.2 x 106 y | β– to 98Ru | 6 | |
| 99Tc | 98.907 | 213000 y | β– to 99Ru | 9/2 | 5.6847 |