Out of $α, β$ and $γ$ radiation,
Which radiation is most penetrating and which radiation are negatively charged?

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Solution

Out of $α, β$ and $γ$ radiation, gamma $(γ)$ radiation has the most penetrating power because $γ -$ radiation has the shortest wavelength.
$α$ -radiation is the double ionize of helium atom like $H e^{2 +}$ it consists of two neutron and two protons.
$β -$ rays have negatively charged ion like ${}_{- 1}^{0}e$ .
$γ -$ rays are neutral particles.
Hence, out of $α, β$ and $γ$ radiation has most penetrating power and $β -$ radiation has negatively charged.

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