Fluorine vs Einsteinium
| Property | F Fluorine | Es Einsteinium |
|---|---|---|
| Atomic number | 9 | 99 |
| Symbol | F | Es |
| Name | Fluorine | Einsteinium |
| Category | halogen | actinide |
| Standard Atomic Weight | 18.998403 u | 252 u |
| Period | 2 | 7 |
| Group | 17 | N/A |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p5 | [Rn]7s25f11 |
| Oxidation states | -1 | [2, 3, 4] |
| Electronegativity (Pauling) | 3.98 | 1.3 |
| Electron affinity | 3.4011 eV | -0.3 eV |
| Density | 1.696 kg/m³ | 8840 kg/m³ |
| Melting point | -219.62 °C | 859.85 °C |
| Boiling point | -188.12 °C | -273.15 °C |
| Discovery year | 1886 | 1952 |