Now look at the green lines you created by connecting the three boiling point data points
and the three melting point data points. for each of these lines, describe any trends you see.

1. Melting and boiling point increase as the atomic number increases.

There will be an increase in the boiling point with an increase in the molecular mass.

Explanation:

The melting point is the temperature at which the substance changes from a liquid state to a vapor state at a constant pressure. The pressure required to effect this change is known as the vapor pressure. The higher the vapor pressure, the higher the boiling point and the lesser time it takes for the substance to escape from the liquid state. In this case, a higher molecular mass means more energy is needed to make sure that there is a gaseous change. In addition, the higher melting point requires the lower temperature as well.

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