* Gas: This is the most common state of chlorine at room temperature and pressure. It's a yellowish-green, pungent, and highly toxic gas.
* Liquid: Chlorine can be liquefied by increasing the pressure or decreasing the temperature. Liquid chlorine is a pale yellow liquid stored in pressurized containers.
* Solid: Chlorine can solidify at even lower temperatures (around -101°C or -149°F). Solid chlorine is a yellow-white crystalline solid.
The transitions between these states are called phase changes:
* Gas to Liquid: This is called condensation.
* Liquid to Gas: This is called vaporization or evaporation.
* Gas to Solid: This is called deposition.
* Solid to Gas: This is called sublimation.
* Solid to Liquid: This is called melting.
* Liquid to Solid: This is called freezing.
So, chlorine can change from a gas to a liquid or solid depending on the conditions of temperature and pressure.
