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Question
Why do the nuclei of some atoms undergo radioactive decay?
Options
To react chemically with neighbouring atoms
To absorb energy from external radiation sources
To become more stable by emitting energy or particles
To increase their total mass and become heavier
MCQ
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Solution
Atoms of some elements have unstable nuclei. To become more stable, these nuclei undergo radioactive decay, emitting energy or particles. Stability is the driving force behind the spontaneous decay process.
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