Final answer:
The correct statement is that the atoms in bromine gas are more spread out than those in liquid bromine due to the large separations and weak forces between them, except during collisions. So the correct option is C.
Step-by-step explanation:
The statement about the atoms of liquid bromine and bromine gas that is true is C: atoms in bromine gas are more spread out than the atoms in liquid bromine. In the gaseous state, atoms and molecules are separated by large distances compared to their sizes. This separation allows them to move freely and occupy all the accessible volume. The forces between them in a gas are very weak, except during collisions. In contrast, in the liquid state, atoms and molecules are closer together and interact more frequently, making them less spread out than in the gaseous state.