Attribute | Krypton × | Radon × |
---|---|---|
Standard state | Gas | Gas |
1↑Electron configuration | [Ar]4s²3d¹⁰4p⁶ | [Xe]6s²4f¹⁴5d¹⁰6p⁶ |
Atomic mass (u) | 83.8 | 222.01758 |
Electronegativity (pauling scale) | 3 | - |
Oxidation states |
|
|
Ionization energy (eV) | 14 | 10.745 |
Atomic radius (van der waals) (pm) | 202 | 220 |
Boiling point (K) | 119.93 | 211.45 |
Melting point (K) | 115.79 | 202 |
Density (g/cm³) | 0.003733 | 0.00973 |
Atomic number | 36 | 86 |
Group name | Noble gas | Noble gas |
Symbol | Kr | Rn |
Discovered (year) | 1898 | 1900 |