Noble gas (data page) Phase changes and critical properties Phase changes and critical properties

| Physical_property | Helium | Neon | Argon | Krypton | Xenon |
|---|---|---|---|---|---|
| Boiling point (°C) | −268.8 | −245.9 | −185.8 | −151.7 | −106.6 |
| Melting point (°C) | − | −248.5 | −189.6 | −157.4 | −111.5 |
| Critical temperature (K) | 5.25 | 44.5 | 150.85 | 209.35 | 289.74 |
| Critical pressure (atm) | 2.26 | 26.9 | 48.3 | 54.3 | 57.64 |
| Critical density (g/mL) | 0.0693 | 0.484 | 0.536 | 0.908 | 1.100 |
| Triple point temperature (K) | 24.562 | 83.80 | 115.76 | 161.37 | 202 |
| Triple point pressure (kPa) | 5.1 | 43.37 | 68.90 | 73.15 | 81.66 |