Tc
Technetium
Element 43 · Transition metal · Period 5, Group 7
Solid · Discovered 1937
Atomic Properties
| Atomic Number | 43 |
| Atomic Mass | 96.90636u |
| Electron Configuration | [Kr]5s2 4d5 |
| Electronegativity | 1.9Pauling |
| Atomic Radius | 209pm |
| Ionization Energy | 7.28eV |
| Electron Affinity | 0.55eV |
| Oxidation States | +7, +6, +4 |
Physical Properties
| Standard State | Solid |
| Melting Point | 2430K |
| Boiling Point | 4538K |
| Density | 11g/cm³ |
| Group Block | Transition metal |
| Year Discovered | 1937 |