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Protons, neutron and electrons

What are the relative masses of protons, neutron and electrons? Proton is 1, Neutron is 1 and Electron is 1/2000
What is an isotope? Isotopes are atoms of the same element with different numbers of neutrons
Why do isotopes of the same element react in the same way? Because chemical reactions involve electrons and because neutrons make no difference to chemical reactivity
Created by: stu036768