Astatine vs Flerovium
| Property | At Astatine | Fl Flerovium |
|---|---|---|
| Atomic number | 85 | 114 |
| Symbol | At | Fl |
| Name | Astatine | Flerovium |
| Category | halogen | post-transition-metal |
| Standard Atomic Weight | 210 u | 289 u |
| Period | 6 | 7 |
| Group | 17 | 14 |
| Block | p | p |
| Phase at STP | solid | gas |
| Electron configuration | [Xe]6s24f145d106p5 | [Rn] 7s27p2 5f14 6d10(predicted) |
| Oxidation states | [-1, 1, 3, 5, 7] | [0, 1, 2, 4, 6] |
| Electronegativity (Pauling) | 2.2 | N/A |
| Electron affinity | 2.391 eV | -0.5 eV |
| Density | 7000 kg/m³ | 9928 kg/m³ |
| Melting point | 301.85 °C | -273.15 °C |
| Boiling point | -273.15 °C | -63.15 °C |
| Discovery year | 1940 | 1998 |