Fluorine vs Radium
| Property | F Fluorine | Ra Radium |
|---|---|---|
| Atomic number | 9 | 88 |
| Symbol | F | Ra |
| Name | Fluorine | Radium |
| Category | halogen | alkaline-earth-metal |
| Standard Atomic Weight | 18.998403 u | 226 u |
| Period | 2 | 7 |
| Group | 17 | 2 |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p5 | [Rn]7s2 |
| Oxidation states | -1 | [2] |
| Electronegativity (Pauling) | 3.98 | 0.9 |
| Electron affinity | 3.4011 eV | 0.096 eV |
| Density | 1.696 kg/m³ | 5000 kg/m³ |
| Melting point | -219.62 °C | 699.85 °C |
| Boiling point | -188.12 °C | 1139.85 °C |
| Discovery year | 1886 | 1898 |