Chlorine vs Technetium
| Property | Cl Chlorine | Tc Technetium |
|---|---|---|
| Atomic number | 17 | 43 |
| Symbol | Cl | Tc |
| Name | Chlorine | Technetium |
| Category | halogen | transition-metal |
| Standard Atomic Weight | 35.4515 u | 98 u |
| Period | 3 | 5 |
| Group | 17 | 7 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p5 | [Kr]5s24d5 |
| Oxidation states | [-1, 1, 2, 3, 4, 5, 6, 7] | [-3, -1, 1, 2, 3, 4, 5, 6, 7] |
| Electronegativity (Pauling) | 3.16 | 1.9 |
| Electron affinity | 3.6127 eV | 0.55 eV |
| Density | 3.214 kg/m³ | 1.100000e+4 kg/m³ |
| Melting point | -101.5 °C | 2156.85 °C |
| Boiling point | -34.04 °C | 4264.85 °C |
| Discovery year | 1774 | 1937 |