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