Attribute | Krypton × | Argon × |
---|---|---|
Electronegativity (pauling scale) | 3 | - |
Atomic mass (u) | 83.8 | 39.9 |
Standard state | Gas | Gas |
Oxidation states |
|
|
Electron configuration | [Ar]4s²3d¹⁰4p⁶ | [Ne]3s²3p⁶ |
Ionization energy (eV) | 14 | 15.76 |
Atomic radius (van der waals) (pm) | 202 | 188 |
Boiling point (K) | 119.93 | 87.3 |
Melting point (K) | 115.79 | 83.8 |
Density (g/cm³) | 0.003733 | 0.0017837 |
Atomic number | 36 | 18 |
Group name | Noble gas | Noble gas |
Discovered (year) | 1898 | 1894 |
Symbol | Kr | Ar |