Actinium vs Tennessine
| Property | Ac Actinium | Ts Tennessine |
|---|---|---|
| Atomic number | 89 | 117 |
| Symbol | Ac | Ts |
| Name | Actinium | Tennessine |
| Category | actinide | halogen |
| Standard Atomic Weight | 227 u | 294 u |
| Period | 7 | 7 |
| Group | N/A | 17 |
| Block | s | p |
| Phase at STP | solid | solid |
| Electron configuration | [Rn]7s26d1 | [Rn] 7s2 7p5 5f14 6d10(predicted) |
| Oxidation states | [3] | [-1, 1, 3, 5] |
| Electronegativity (Pauling) | 1.1 | N/A |
| Electron affinity | 0.35 eV | 1.8 eV |
| Density | 1.007000e+4 kg/m³ | 7200 kg/m³ |
| Melting point | 1050.85 °C | 549.85 °C |
| Boiling point | 3197.85 °C | 609.85 °C |
| Discovery year | 1899 | 2010 |