Attribute | Value |
---|---|
Symbol | Ar |
Standard state | Gas |
Atomic mass | 39.9 u |
Electron configuration | [Ne]3s²3p⁶ |
Oxidation states |
|
Atomic radius (van der waals) | 188 pm |
Ionization energy | 15.76 eV |
Melting point | 83.8 K |
Boiling point | 87.3 K |
Density | 0.0017837 g/cm³ |
Atomic number | 18 |
Group name | Noble gas |
Discovered | 1894 year |
Electronegativity (pauling scale) | Add |
Electron affinity | Add |