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What causes a nucleus to become radioactive?
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What causes a nucleus to become radioactive?

User Lko
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Answer:

The strong nuclear force attracts and binds protons and makes the nucleus unstable.

Step-by-step explanation:

User Shawnest
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When the atoms of radioactive elements have an unstable nucleus. As the nucleus tries to become stable, it releases energy (ionizing radiation), and extra protons or neutrons in the form of alpha or beta particles.
User Carsten Franke
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