Helium
|
2 He 4.0026 |
Atomic Number | 2 |
| Atomic Weight | 4.0026 | |
| Electron Config. | 2 |
| Electron configuration order: 1s-2s-2p-3s-3p-3d-4s-4p-4d-4f-5s-5p-5d-5f-6s-6p-6d-7s |
| Mechanical Properties | Conditions | |||
| Phase | Temp. (K) | Pressure (Pa) | ||
| Density | 0.1785 kg/m3 | Gas | 293.15 | 101325 |
| Density | 124.901 kg/m3 | Liquid | 4.2221 | 101325 |
| Thermal Properties | Conditions | ||
| Temp. (K) | Pressure (Pa) | ||
| Melting Temperature | 3.5 K | 101325 | |
| Boiling Temperature | 4.22 K | 101325 | |
| Critical Temperature | 5.19 K | ||
| Fusion Enthalpy | 2.1 J/g | 0 | 101325 |
| Vaporization Enthalpy | 20.71 J/g | 0 | 101325 |
| Heat Capacity | 5193 J/kg-K | 298.149993896 | 100000 |
