Question

isotope2. different isotopes of the same element must have different __________. select all the correct answer(s). atomic numbers numbers of electrons number of protons numbers of neutrons mass numbers

Explanation:

Isotopes of an element have the same atomic number (same number of protons and electrons), but different numbers of neutrons. Since mass number = protons + neutrons, different neutrons mean different mass numbers.

Answer:

D. numbers of neutrons, E. mass numbers