Question

What trends can you see in the melting point and the boiling point of the halogens?
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Answer 1

Melting and Boiling Points (increases down the group)

The melting and boiling points increase down the group because of the van der Waals forces. The size of the molecules increases down the group. This increase in size means an increase in the strength of the van der Waals forces.

Step-by-step explanation:

Answer 2

The boiling points increase down the group.

Step-by-step explanation:

The melting and boiling points increase down the group because of the van der Waals forces. The size of the molecules increases down the group. This increase in size means an increase in the strength of the van der Waals forces.