Attribute | Oxygen × | Xenon × |
---|---|---|
Atomic mass (u) | 15.999 | 131.29 |
Standard state | Gas | Gas |
Oxidation states |
|
|
Electron configuration | [He]2s²2p⁴ | [Kr]5s²4d¹⁰5p⁶ |
Atomic radius (van der waals) (pm) | 152 | 216 |
Electronegativity (pauling scale) | 3.44 | 2.6 |
Electron affinity (eV) | 1.461 | - |
Ionization energy (eV) | 13.618 | 12.13 |
1↑Boiling point (K) | 90.2 | 165.03 |
Melting point (K) | 54.36 | 161.36 |
Density (g/cm³) | 0.001429 | 0.005887 |
Atomic number | 8 | 54 |
Group name | Nonmetal | Noble gas |
Symbol | O | Xe |
Discovered (year) | 1774 | 1898 |