Question

In the gamma decay of a nucleus
(a) the mass number of the nucleus changes whereas its atomic number does not change
(b) the mass number of the nucleus does not change whereas its atomic number changes
(c) both the mass number and the atomic number of the nucleus change
(d) neither the mass number nor the atomic number of the nucleus changes

Answer 1

In the Gamma decay of the nucleus "the mass number of the nucleus changes whereas its atomic number does not change".