Final answer:
Isotopes, specifically carbon-14, are atoms with different numbers of neutrons than protons, such as used in carbon dating.
Explanation:
An isotope is an atom of an element with a different number of neutrons than protons in its nucleus. For example, carbon-14 (¹⁴C) is a radioactive isotope of carbon that is used in carbon dating to determine the age of organic materials. It has 8 neutrons and 6 protons, making it unstable and undergo radioactive decay.
Learn more about Isotopes and Radioactive Decay here:
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