When a gas changes into a liquid, it is called and the speed of the molecules is

Explanation:

Condensation is defined as the process in which gaseous state of a substance changes into liquid state.

As it is known that in gaseous state, molecules are held by Vander waal forces due to which they have high kinetic energy.

In liquids, molecules are held by slightly strong intermolecular forces of attraction as compared to gases. Hence, molecules of a liquid are able to slight past each other.

Hence, they have definite volume but no definite shape. So, liquid molecules have less energy than gaseous gases.

Thus, we can conclude that when a gas changes into a liquid, it is called condensation, and the speed of the molecules is slower.

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).