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NEET 2013 · Radioactive Decays: Alpha, Beta, Gamma

Radioactive Decays: Alpha, Beta, Gamma question from NEET 2013

Q25NEET 2013Easy

Radioactive Decays: Alpha, Beta, Gamma

$\alpha$ -particles, $\beta$ -particles and $\gamma$ -rays are all having same energy. Their penetrating power in a given medium in increasing order will be

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Answer: (b)

Penetration is lower for heavier, more strongly charged particles that ionise more.
$\alpha$ (charge $+2e$ , heavy) $<$ $\beta$ (charge $e$ , light) $<$ $\gamma$ (no charge).
So the answer is (b) $\alpha, \beta, \gamma$ .

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