Fluorine vs Krypton
| Property | F Fluorine | Kr Krypton |
|---|---|---|
| Atomic number | 9 | 36 |
| Symbol | F | Kr |
| Name | Fluorine | Krypton |
| Category | halogen | noble-gas |
| Standard Atomic Weight | 18.998403 u | 83.798 u |
| Period | 2 | 4 |
| Group | 17 | 18 |
| Block | p | p |
| Phase at STP | gas | gas |
| Electron configuration | [He]2s22p5 | [Ar]4s23d104p6 |
| Oxidation states | -1 | [0, 1, 2] |
| Electronegativity (Pauling) | 3.98 | 3 |
| Electron affinity | 3.4011 eV | -1 eV |
| Density | 1.696 kg/m³ | 3.733 kg/m³ |
| Melting point | -219.62 °C | -157.36 °C |
| Boiling point | -188.12 °C | -153.42 °C |
| Discovery year | 1886 | 1898 |