Q140. During the process of nuclear disintegration, when beta particle emission occurs, atomic no. of the atom changes by _____ and the mass number changes by ______.Physics — NUST Mock 6 — Question 140 of 200A. One unit ; one unitB. One unit ; no unitsC. No units ; one unitD. No units ; no unitsPractice more Physics MCQs for entrance exam preparation on Examora.io.← Previous Question Next Question →