Attribute | Argon × | Xenon × |
---|---|---|
1↑Electronegativity (pauling scale) | - | 2.6 |
Atomic mass (u) | 39.9 | 131.29 |
Standard state | Gas | Gas |
Oxidation states |
|
|
Electron configuration | [Ne]3s²3p⁶ | [Kr]5s²4d¹⁰5p⁶ |
Ionization energy (eV) | 15.76 | 12.13 |
Atomic radius (van der waals) (pm) | 188 | 216 |
Boiling point (K) | 87.3 | 165.03 |
Melting point (K) | 83.8 | 161.36 |
Density (g/cm³) | 0.0017837 | 0.005887 |
Atomic number | 18 | 54 |
Group name | Noble gas | Noble gas |
Discovered (year) | 1894 | 1898 |
Symbol | Ar | Xe |