Fermium vs Tennessine
| Property | Fm Fermium | Ts Tennessine |
|---|---|---|
| Atomic number | 100 | 117 |
| Symbol | Fm | Ts |
| Name | Fermium | Tennessine |
| Category | actinide | halogen |
| Standard Atomic Weight | 257 u | 294 u |
| Period | 7 | 7 |
| Group | N/A | 17 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Rn] 5f12 7s2 | [Rn] 7s2 7p5 5f14 6d10(predicted) |
| Oxidation states | [2, 3] | [-1, 1, 3, 5] |
| Electronegativity (Pauling) | 1.3 | N/A |
| Electron affinity | 0.339 eV | 1.8 eV |
| Density | 9700 kg/m³ | 7200 kg/m³ |
| Melting point | 1526.85 °C | 549.85 °C |
| Boiling point | -273.15 °C | 609.85 °C |
| Discovery year | 1952 | 2010 |