* Water is a good solvent: Water is an excellent solvent, meaning it dissolves many substances. This includes gases like oxygen and nitrogen, which are normally found dissolved in water.
* Freezing removes most dissolved gases: When water freezes, the water molecules form a rigid crystal structure. This structure doesn't allow much space for dissolved gases to remain.
* Tiny air bubbles may form: While most gases are expelled, some tiny air bubbles might be trapped during the freezing process. These bubbles would contain mostly nitrogen and oxygen, just like the air we breathe.
So, while it's technically possible to have some trapped air bubbles, the amount of gas in an ice cube is negligibly small compared to the volume of water.
