# Is chlorine a solid, liquid, or gas at room temperature?

$\text{Elemental chlorine, } C {l}_{2}$ should be a gas at room temperature and pressure.
The metling point of elemental chlorine, $C {l}_{2}$, is $- 101.5$ ""^@C; its boiling point is $- 34.0$ ""^@C. Clearly an ambient pressure of $1$ $a t m$ is specified.