Noble gas (data page)
This page provides supplementary data about the noble gases, which were excluded from the main article to conserve space and preserve focus. Oganesson mostly not included due to the amount of research known about it.
Physical properties
Solid
| Physical property | Helium | Neon | Argon | Krypton | Xenon | Radon |
| Density, solid at tp | – | 1444 | 1623 | 2826 | 3540 | – |
| Crystal structure | hcp | fcc | fcc | fcc | fcc | fcc |
Liquid
| Physical property | Helium | Neon | Argon | Krypton | Xenon | Radon |
| Density, liquid at bp and 1 atm | 125.0 | 1207 | 1393.9 | 2415 | 3057 | 4400 |
| Density, liquid at tp | – | 1247 | 1415 | 2451 | 3084 | – |
| Thermal conductivity, liquid at bp | 31.4 | 129.7 | 121.3 | 88.3 | 73.2 | – |
| Dielectric constant | 1.057 | 1.191 | 1.325 | 1.664 | 1.880 | — |
Gas
| Physical property | Helium | Neon | Argon | Krypton | Xenon | Radon |
| Density, gas at 0 °C and 1 atm | 0.1786 | 0.9002 | 1.7818 | 3.708 | 5.851 | 9.97 |
| Thermal conductivity at 0 °C | 0.1418 | 0.0461 | 0.0169 | 0.00874 | 0.00506 | 0.0036 |
| Mean Free Path at STP | 192.66 | 135.36 | 68.33 | 52.34 | 37.88 | – |
| Solubility in water at 20 °C | 8.61 | 10.5 | 33.6 | 59.4 | 108.1 | 230 |
| Magnetic susceptibility | −0.0000019 | −0.0000072 | −0.0000194 | −0.000028 | −0.000043 | – |
| Heat capacity, Cp, gas at 1 atm | 20.78 | 20.79 | 20.85 | 20.95 | 21.01 | 21 |
| Sonic velocity at 0 °C and 1 atm | 973 | 433 | 307.8 | 213 | 168 | – |
| Thermal conductivity, gas at 0 °C and 1 atm | 141.84 | 46.07 | 16.94 | 8.74 | 5.06 | 3.6 |
| Molar refraction | 0.521 | 1.004 | 4.203 | 6.397 | 10.435 | – |
| Dielectric constant | 1.0000684 | 1.00013 | 1.000516 | – | – | – |
| van der Waals constant a | 0.03412 | 0.2107 | 1.345 | 2.318 | 4.194 | – |
| van der Waals constant b | 0.02370 | 0.01709 | 0.03219 | 0.03978 | 0.05105 | – |
Phase changes and critical properties
| Physical property | Helium | Neon | Argon | Krypton | Xenon | Radon |
| Boiling point | −268.8 | −245.9 | −185.8 | −151.7 | −106.6 | −61.7 |
| Boiling point | 4.15 | 27.15 | 87.15 | 121.2 | 165.2 | 211.3 |
| Melting point | −272 | −248.5 | −189.6 | −157.4 | −111.5 | −71.0 |
| Critical temperature | 5.25 | 44.5 | 150.85 | 209.35 | 289.74 | 378.15 |
| Critical pressure | 2.26 | 26.9 | 48.3 | 54.3 | 57.64 | 62 |
| Critical density | 0.0693 | 0.484 | 0.536 | 0.908 | 1.100 | – |
| Triple point temperature | 2.19 | 24.562 | 83.80 | 115.76 | 161.37 | 202 |
| Triple point pressure | 5.1 | 43.37 | 68.90 | 73.15 | 81.66 | 70 |