Krypton |
| Symbol | Kr |
|---|---|
| Latin name | Krypton |
| Atomic number | 36 |
| Period | 4 |
| Element category | Noble gases |
| Relative atomic mass | 83.8 |
| Group | VIII.A |
| Oxidation numbers | 2, 4 |
| Electron configuration | 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 |
| Density [g/cm3] | 0.0037493 |
| State | Gas |
| Melting point [°C] | -157.10 |
| Boiling point [°C] | -152.30 |
| Critical point [°C] | -63.74 |
| Critical pressure [MPa] | 5.5 |
| Atomic radius [pm] | 88 |
| Covalent radius [pm] | 110 |
| Thermal conductivity [W m-1K-1] | 0.00949 |
| Heat capacity [J K-1g-1] | 0.248 |
| Discovery | 1898 |
| 1.st ionization energy [eV] | 13.9996 |
| 2.nd ionization energy [eV] | 24.359 |
| 3.rd ionization energy [eV] | 36.95 |
| Stable isotopes | 6 |
| Unstable isotopes | 17 |