Question

1. What changes in the nucleus during alpha decay?

(a) atomic number
(b) mass number
(c) atomic number and mass number
(d) nothing

Answer 1

Mass Number and Atomic Number

Step-by-step explanation:

Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits an alpha particle 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.