# Why is boron or carbon solids and chlorine a gas at room temperature

I know different compounds have different states at room temperature because of inter-molecular forces ( dipole-dipole force, hydrogen bonding, and London dispersion forces).

But how do they act on elements? Is there any other inter-moleculer force.

Chlorine however is a small simple molecule $$\ce{Cl2}$$. Here only van der Waals forces hold the molecules together meaning that they can easily be broken - hence why its a gas at room temp.