Ar18 – Argon
- Atomic Number18
- Atomic SymbolAr
- Atomic NameArgon
- Atomic Mass39.9
- CPK Hex Color80D1E3
- Electron Configuration[Ne]3s2 3p6
- Electron Negativity
- Atomic Radius188
- Ionization Energy15.76
- Electron Affinity
- Oxidation States0
- Standard StateGas
- Melting Point83.8
- Boiling Point87.3
- Density0.0017837
- Group BlockNoble gas
- Year Discovered1894
Periodic Table of Elements. (2022, December 23). In PubChem and the National Library of Medicine. https://pubchem.ncbi.nlm.nih.gov/periodic-table/#view=table