| Krypton ✕ | |
|---|---|
| Symbol | Kr |
| Atomic number | 36 |
| Chemical property | Noble gas |
| Origin o the name | the Greek kryptos, 'hidden' |
| Group | 18 |
| Period | 4 |
| Atomic weight (u) | 83.798 |
| Atomic weight uncertainty (u) | 0.002 |
| Density (g/cm³) | 0.003733 |
| Melting point (K) | 115.79 |
| Boiling point (K) | 119.93 |
| Heat capacity (J/(g·K)) | 0.248 |
| Electro-negativity | 3 |
| Abundance in earth's crust (mg/kg) | 0.0001 |