Essential Chemistry for IGCSE - Atoms, Elements And Compounds (Section 2 - No. 26)
What are the isotopes of an element?
Atoms with the same atomic number but different mass numbers.
Atoms with the same mass number but different atomic numbers.
Atoms with the same number of protons and neutrons.
Atoms with different chemical properties.
Explanation
Isotopes have the same number of protons (same element) but different numbers of neutrons.
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