Here's why:
* Low Melting Point: Chlorine molecules are held together by weak van der Waals forces. These forces are easily overcome by relatively small amounts of energy, so chlorine melts at a low temperature (-101.5 °C).
* Low Boiling Point: Similarly, the weak forces between chlorine molecules require little energy to break, allowing it to vaporize at a relatively low temperature (-34.04 °C).
Therefore, chlorine is a gas with a low melting point and a low boiling point.