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Biology  /  Bio 0117  ·  Atom · ~20 seconds

Isotopes

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Isotopes are atoms of the same element that share the same number of protons but differ in their number of neutrons.

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Carbon-12 has six neutrons and carbon-14 has eight, though both are carbon with six protons each.

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Differing neutron counts change an atom's mass, not the element it belongs to.