Fluorine vs Fermium
| Property | F Fluorine | Fm Fermium |
|---|---|---|
| Atomic number | 9 | 100 |
| Symbol | F | Fm |
| Name | Fluorine | Fermium |
| Category | halogen | actinide |
| Standard Atomic Weight | 18.998403 u | 257 u |
| Period | 2 | 7 |
| Group | 17 | N/A |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p5 | [Rn] 5f12 7s2 |
| Oxidation states | -1 | [2, 3] |
| Electronegativity (Pauling) | 3.98 | 1.3 |
| Electron affinity | 3.4011 eV | 0.339 eV |
| Density | 1.696 kg/m³ | 9700 kg/m³ |
| Melting point | -219.62 °C | 1526.85 °C |
| Boiling point | -188.12 °C | -273.15 °C |
| Discovery year | 1886 | 1952 |