During which changes of state do atoms that cannot move past one another become free to move?

There are three states of matter: solid, liquid and gas. In solid state, atoms that make up the data are compact and do not move about. In liquid state, particle ha little force of attraction and are free to move about within the container containing the liquid. I gaseous state, atoms move about freely and there is no force of attraction between the atoms. The change of state from solid tog liquid is called melting while the change of state from solid to gas is called sublimation.