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During radioactive decay, which of the following particles is not released by radioactive substances?

1. Protons
2. Neutrinos
3. Helium nuclei
4. Electrons

Correct answer: Protons

Solution

Protons are not typically emitted during radioactive decay processes; instead, decay often involves the release of particles such as alpha particles (helium nuclei), beta particles (electrons), and neutrinos, depending on the type of decay.

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