Question

The mass number of a nucleus is
(a) always less than its atomic number
(b) always more than its atomic number
(c) equal to its atomic number
(d) sometimes more than and sometimes equal to its atomic number.

Answer 1

Explanation:

The mass number of a nucleus is

(b) always more than its atomic number

because nucleus has proton and nutron

and atomic number = protons

Answer 2

Answer:

sometimes more than and sometimes equal to (Protium) its atomic number.

Hope this helps