Neutral atoms always have the same number of (3 points) O electrons and protons neutrons and electron O protons and neutrons Isotopes of the same element always have the same (3 points) AMU number A-number Z-number The magnitude of the charge on an electron compared to the magnitude of the charge on a proton is greater is smaller is the sane Solution 1. Neutral atoms always have same number of electrons and protons . Electrons and protons have equal but opposite charge. So neutral atom should have balance of electrons and protons. 2. Isotopes of the same element always have the same Z- number. All isotopes of a given element have the same number of protons in each atom. 3. The magnitude of the charge on an electron to the magnitude of the charge on a proton is the same. Charge on electron is : -e Charge on proton is : +e e = 1.6×10 -19 C .