Final answer:
Isotopes are different forms of an element with the same proton count but varying neutron numbers, like Carbon-12 and Carbon-14.
Explanation:
Isotopes are different forms of the same element that have the same number of protons but a different number of neutrons. For example, Carbon-12 and Carbon-14 are isotopes of carbon since they have the same number of protons but differing numbers of neutrons. Isotopes have the same chemical properties but different atomic masses due to varying neutron numbers.
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