Question

Atoms of different isotopes of the same element differ in their total number of

(1) electrons (3) protons
(2) neutrons (4) valence electrons

Answer 1

nuetrons

Step-by-step explanation:

Changing the protons will change the element so that cant be it. not 1 and 4

3

Answer 2

Atoms of different isotopes of the same element differ in their total number of Neutrons.