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) |