True: Atoms can be identified by the number of protons in their nuclei., Isotopes have similar chemical properties., The magnesium isotopes can be represented as Mg-24, Mg-25, Mg-26., False: Isotopes have different arrangements of electrons., An atom with 7 protons and a mass number of 14 is a different element to one with an atomic number of 7 and a mass number of 15., All isotopes are radioactive.,

Isotopes

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