How mothballs vapour acts as insecticides by kinetic theory of matter

Mothballs are solid balls that vaporize when exposed to heat and become smaller until they disappear, this process is called sublimation, and it is part if the kinetic theory of matter. Sublimation is when solid particles break away from each other and the surface to form a gas/vapor. Sublimation is the direct change of solid to gas bypassing the liquid phase.

Explanation:

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.