F Standard State of Elements
All elements are a solid at 25 °C and 1 bar (0.1 MPa) with the following exceptions:
| Liquids | Monatomic gases | Diatomic gases |
|---|---|---|
| Bromine, Br2(l) | Helium, He(g) | Hydrogen, H2(g) |
| Mercury, Hg(l) | Neon, Ne(g) | Nitrogen, N2(g) |
| Argon, Ar(g) | Oxygen, O2(g) | |
| Krypton, Kr(g) | Fluorine, F2(g) | |
| Xenon, Xe(g) | Chlorine, Cl2(g) | |
| Radon, Rn(g) |