Chlorine is a chemical element that exists as a greenish-yellow gas at room temperature and pressure.
At normal atmospheric conditions, chlorine is in the gaseous state. However, if subjected to sufficiently low temperatures or high pressures, chlorine can be converted into a liquid or solid state. For instance, at -34 degrees Celsius (-29 degrees Fahrenheit) or under high pressure, it can be liquefied, and at even lower temperatures, it can solidify into a yellow crystalline substance.
This phase behavior is typical for many elements and compounds, showcasing the influence of temperature and pressure on their states of matter.