A. may become a different element. B. becomes a different isotope of the element. C. daughter with increased mass. D. becomes a daughter of a different element always.
Correct Answer: A
Explanation
Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle (helium nucleus) and thereby transforms or 'decays' into a different atomic nucleus, with a mass number that is reduced by four and an atomic number that is reduced by two.
