Chlorine has a density of 0.03 g/cm3 and bromine has a density of 3.12 g/cm3. A student makes a comment about the densities. “The difference in molecular mass of chlorine and bromine is not enough to account for the difference in densities.” Explain why the student is correct.
Ok, now you are referring to the difference in their physical states. The chlorine is in gaseous state at room temperature, while the bromine is in the liquid state.