Physics for IGCSE & O level - Atoms And Radioactivity (Section 1 - No. 35)
Which of the following statements about isotopes is true?
Isotopes have the same number of protons but a different number of neutrons.
Isotopes have the same number of neutrons but a different number of protons.
Isotopes have different chemical properties.
Isotopes of the same element have different atomic numbers.
Explanation
Isotopes have the same number of protons but a different number of neutrons.
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