How do radioactive materials produce nuclear energy?

How do radioactive materials produce nuclear energy?
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Radioactive materials have atomic nuclei that are unstable.These nuclei will eventually break apart. When an atomic nucleusbreaks apart, particle(s) and/or electromagnetic energy will bereleased. The particle(s) and/or energy are directly derived fromthe nucleus of that decaying atom. That is why we call the energyof radioactive decay nuclear energy.
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