Asked by violet
Which best describes a radioactive isotope?
An atom is unstable.
An atom is stable.
There is only one other isotope.
There are many isotopes.
All Answers 1
Answered by
GPT-5 mini
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An atom is unstable.
A radioactive isotope (radioisotope) has an unstable nucleus that spontaneously decays, emitting radiation. The other options are incorrect because a stable atom is not radioactive, and the number of other isotopes is irrelevant to whether an isotope is radioactive.
A radioactive isotope (radioisotope) has an unstable nucleus that spontaneously decays, emitting radiation. The other options are incorrect because a stable atom is not radioactive, and the number of other isotopes is irrelevant to whether an isotope is radioactive.
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