The states of matter and melting points of Group 17 (halogens) can be explained by the presence of intermolecular forces between molecules

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The states of matter and melting points of Group 17 (halogens) can be explained by the presence of intermolecular forces between molecules. The statement that best describes the reason for the increasing melting points going down the group is

 

A. iodine and bromine have weaker London forces compared to chlorine

 

B. iodine and bromine have stronger London forces compared to chlorine

 

C. iodine and bromine have dipole-dipole forces whereas chlorine does not

 

D. the number of electrons and molecular masses of the halogen family increases as you move up the group