Apositively-charged piece of plastic exerts an attractive force on an electrically neutral piece of paper. this is because: 1. electrons are less massive than atomic nuclei 2. the electric force between charged particles decreases with increasing distance 3. an atomic nucleus occupies only a small part of the volume of an atom 4. a typical atom has many electrons but only one nucleus

1 ) Electrons are less massive than than atomic nuclei.

Explanation:

A positively charged body tends to attract negatively charged particle and repel positively charged particle. Neutral body consists of atoms which contain both positively charged particles ( electrons ) and negatively charged particles ( protons ). Electrons are small and light in weight . Both electrons and protons experience equal and opposite force by an external charged body but shift in electron is more because of their being comparatively lighter. So the body gets polarized due to uneven distribution of charge. This results into body getting attracted through the process of induction.

its c i just checked it