| Color: | colorless |
| State at 25°C: | gas |
| Density (g/cm3): | 0.0009 |
| Hardness (Mohs): | no data |
| Melting Point (K): | 24.56 |
| Boiling Point (K): | 27.07 |
| Heat of Fusion (kJ/mol): | 0.328 |
| Heat of Vaporization (kJ/mol): | 1.71 |
| Heat of Atomization (kJ/mol): | 0 |
| Therm. Conductivity (J/m sec K): | 0.0491 |
| Elec. Conductivity (1/mohm cm): | no data |
| Abundance, Solar System: | 6.536558443 |
| Abundance, Earth's Crust: | 0 |
| Pure Cost ($/100g): | 33 |
| Bulk Cost ($/100g): | no data |
| Source: | Air |