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Which of the following is not radioactive substances?

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Which of the following is not radioactive substances?

(a) Proton

(b) Positron

(c) α-rays

(d) β-rays

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1 Answer

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Best answer

Correct option (a) Proton

Explanation:

Radioactive substances usually emit a-rays (42He nuclei), β-rays (electrons) or γ-rays or sometimes positrons (01β).

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