Question

helium is a gas. which is true about its particles? helium cannot change its size or shape to fit its container. helium particles are randomly spaced and moving freely. helium does not take the shape of its container.

Explanation:

Gases have particles that are randomly spaced and move freely. They take the shape and volume of their container. Helium, being a gas, follows these properties.

Answer:

Helium particles are randomly spaced and moving freely.