C2 - Isotopes 0.0 / 5 ? ChemistryAtomsGCSEAQA Created by: maddiecorfieldCreated on: 26-11-15 10:25 Define isotopes. Isotopes are different atomic forms of the same element, which have the same number of protons but a different number of neutrons. 1 of 5 Why must isotopes have the same atomic number but different mass numbers? If they had different atomic numbers, they'd be different elements altogether. 2 of 5 What are a popular pair of isotopes? Carbon 12 and Carbon 14 3 of 5 Most elements have different isotopes, but.. usually only one or two stable ones. 4 of 5 The other isotopes tend to be... radioactive, which means they decay into other elements and give out radiation. 5 of 5
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