Question

the atomic mass of an element is equal to

Answer 1

the number of _____ and ______

Answer 2

The atomic mass of an element is equal to number of Protons or Electrons present in the atom.. And as we all know that both of their values are same in number :)

Answer 3

The atomic mass of an element is not equal to the number of protons or Electrons.
There should be no confusion between atomic mass and atomic number which is equal to the number of protons or electrons.