Question

Question 28
The mass number of an element is equal to:

a
the number of protons and electrons
b
the number of protons and neutrons
c
the number of electrons
d
the number of protons

Answer 1

The mass number of an element is equal to:

**b. the number of protons and neutrons**

The mass number is the total count of protons and neutrons in the nucleus of an atom.