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 |