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Chemical element: Argon (Ar)
| Atomic Number: | 18 |
| Element Symbol: | Ar |
| Element Name: | Argon |
| Atomic Weight: | 39.948 |
| Group Number: | 18 |
| Group Name: | Noble gas |
| Period Number: | 3 |
| Block: | p-block |
| Ground State Configuration: | [Ne] 3s2 3p6 |
| Ground State Level: | 1S0 |
| Standard State: | Gas |
| Bond Length: | 372 |
| Atomic Radius Calculated: | 71 |
| Covalent Radius Empirical: | 97 |
| Vander Waals Radius: | 188 |
| First Ionization Energy: | 1520.6 |
| Sanderson Electronegativity: | 3.31 |
| Allred Rochow Electronegativity: | 3.20 |
| Mulliken Jaffe Electronegativity: | 3.19 |
| Allen Electronegativity: | 3.242 |
| Molar Volume: | 22.56 |
| Velocity Of Sound: | 319 |
| Refractive Index: | 1.000281 |
| Melting Point: | -189.3 |
| Boiling Point: | -185.8 |
| Critical Temperature: | -122.2 |
| Thermal Conductivity: | 0.01772 |
| Enthalpy Of Fusion: | 1.18 |
| Enthalpy Of Vaporization: | 6.5 |
| Color: | Colourless |
| Classification: | Non-metallic |
| Discovered By: | Sir William Ramsay, Lord Rayleigh |
| Discovered At: | Scotland |
| Discovered When: | 1894 |
| Origin Of Name: | From the Greek word argos meaning inactive |
Calculate the molecular weight of Argon or molecular weight Ar.
Also see the full list of chemical elements and atomic weights.
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