Argon
Electron Configuration
|
General Properties
| Atomic Symbol | Ar |
| Atomic Weight | 39.948 g/mol |
| Element Number | 18 |
| Standard State | Gas |
| Standard Type | Neutral |
| Date of Discovery | 1894 |
| Discoverer | Rayleigh & Ramsay |
Physical Properties
| Oxidation States | -- |
| Boiling Point | 87.45 K |
| Melting Point | 83.95 K |
| Density | 1.784 (Gas 273K g/l) |
| Electron Configuration | [Ne]3s2,p6 |
| Acid/Base Properties | -- |
| Crystal Structure | Cubic, face centered |
| Electronegativity | -- |
| Heat of Vaporization | 6.506 kJ/mol |
| Heat of Fusion | 1.188 kJ/mol |
| Electrical Conductivity | -- |
| Thermal Conductivity | 0.0177 Wm-¹K-¹ (at 300 K) |
| Specific Heat Capacity | 0.520 Jg-¹K-¹ (at 300 K) |
| First Ionization Potential | 15.759 |
| Atomic Volume | 24.2 cm³/mol |
| Atomic Radius | 0.88 Å |
| Covalent Radius | 0.98 Å |
| Synthetic | No |