Fluorine vs Erbium
| Property | F Fluorine | Er Erbium |
|---|---|---|
| Atomic number | 9 | 68 |
| Symbol | F | Er |
| Name | Fluorine | Erbium |
| Category | halogen | lanthanide |
| Standard Atomic Weight | 18.998403 u | 167.259 u |
| Period | 2 | 6 |
| Group | 17 | N/A |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p5 | [Xe]6s24f12 |
| Oxidation states | -1 | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 3.98 | 1.24 |
| Electron affinity | 3.4011 eV | 0.312 eV |
| Density | 1.696 kg/m³ | 9070 kg/m³ |
| Melting point | -219.62 °C | 1528.85 °C |
| Boiling point | -188.12 °C | 2867.85 °C |
| Discovery year | 1886 | 1843 |