 |
| General |
| Name | Argon |
| Symbol | Ar |
| Number | 18 |
| Group Number | 18 |
| Group | Noble Gas |
| Block | p |
| Density | 0.0017824 g/cm3 |
| Atomic Weight | 39.948 g/mol |
| Atomic Volume | 28.5 cm3/mol |
| Discover | 1894 |
|
| States |
| State | Gas |
| Melting Point | 83.80 K |
| Boiling Point | 87.30 K |
| Triple Point | 83.8058 K |
| Critical Point | 150.87 K |
| Heat of Fusion | 1.18 kJ/mol |
| Heat of Vaporization | 6.43 kJ/mol |
|
| Energies |
| First Ionization Energy | 1520.5 kJ/mole |
| Second Ionization Energy | 2665.8 kJ/mole |
| Third Ionization Energy | 3930.8 kJ/mole |
| Electronegativity | Nil |
| Electron Affinity | Nil |
| Specific Heat | 0.520 J/gK |
| Heat Atomization | 0 kJ/mole atoms |
|
| Oxidation and Electrons |
| Shells | 2,8,8 |
| Electron Configuration | [Ne] 3s2 3p6 |
| Minimum Oxidation Number | 0 |
| Maximum Oxidation Number | 0 |
| Minimum Common Oxidation Number | 0 |
| Maximum Common Oxidation Number | 0 |
|
| Appearance and Characteristics |
| Crystal Structure | cubic face centered |
| Characteristics | Inert |
| Color | colorless |
| Uses | lasers, light bulbs |
| Hardness | mohs |
| Toxicity | No |
|
| Reactions |
| Reaction with Air | None |
| Reaction with 6M HCl | None |
| Reaction with 15M HNO3 | None |
| Reaction with 6M NaOH | None |
|
| Other Forms |
| Number of Isotopes | 3 |
| Hydride | None |
| Oxide | None |
| Chloride | None |
|
| Radius |
| Atomic Radius | 98 pm |
| Ionic Radius (1+ ion) | Nil |
| Ionic Radius (1- ion) | Nil |
| Ionic Radius (2+ ion) | Nil |
| Ionic Radius (2- ion) | Nil |
| Ionic Radius (3+ ion) | Nil |
|
| Conductivity |
| Thermal Conductivity | 0.02 J/m-sec-deg |
| Electrical Conductivity | 0 1/mohm-cm |
| Polarizability | 1.586 A3 |
|
| Abundance |
| Source | Air |
| Relation Abundance Solar System | 5.004 log |
| Abundance Earth's Crust | 0.5 log |
|
