| Technetium | |
| Elemental State | Tc |
| Electron Configuration | 1s22s22p63s23p63d104s24p65s24d5 |
| First Ionization Potential | 7.28 eV |
| Electron Affinity | 0.55 eV (calculated value) |
| Z* | |
| Pauling Electronegativity | 2.10 |
| Covalent Radius | 1.56 Å |
| Metallic Radius | 1.35 Å |
| Ionic Radius | 0.785 Å Tc4+ coordination number = 6 |
| van der Waal's Radius | |
| Melting Point | 2157 oC |
| Boiling Point | 4265 oC |
| Density | 11.50 g/cm3 (calculated value) |
| Other Properties | All isotopes are radioactive
97Tc, half-life = 2.6×106 years 98Tc, half-life = 4.2×106 years 95mTc, half-life = 61 days |