Isotopes of the same element differ in their
Anumber of neutrons.CORRECT
Bnumber of electrons.
Cnumber of protons.
Dchemical properties.
JUPEBChemistryAtomic Structure and Periodicity
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Why the answer is A, and why the others tempt you.
Isotopes have the same atomic number (protons and, in the neutral atom, electrons) but different mass numbers because of different numbers of neutrons. Their chemical properties are essentially identical since these depend on electron arrangement.
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