Beryllium vs Fluorine
| Property | Be Beryllium | F Fluorine |
|---|---|---|
| Atomic number | 4 | 9 |
| Symbol | Be | F |
| Name | Beryllium | Fluorine |
| Category | alkaline-earth-metal | halogen |
| Standard Atomic Weight | 9.012183 u | 18.998403 u |
| Period | 2 | 2 |
| Group | 2 | 17 |
| Block | s | p |
| Phase at STP | solid | gas |
| Electron configuration | [He]2s2 | [He]2s22p5 |
| Oxidation states | [0, 1, 2] | -1 |
| Electronegativity (Pauling) | 1.57 | 3.98 |
| Electron affinity | -0.52 eV | 3.4011 eV |
| Density | 1850 kg/m³ | 1.696 kg/m³ |
| Melting point | 1286.85 °C | -219.62 °C |
| Boiling point | 2470.85 °C | -188.12 °C |
| Discovery year | 1797 | 1886 |