Physics · 2019
NEET 2019 · 20 May · Code G1 · Q167
The rate of radioactive disintegration at an instant for a radioactive sample of half life 2.2 × 10^9 s is 10^10 s^-1. The number of radioactive…
The rate of radioactive disintegration at an instant for a radioactive sample of half life $\displaystyle 2.2 \times 10^9 \mathrm{~s}$ is $\displaystyle 10^{10} \mathrm{~s}^{-1}$. The number of radioactive atoms in that sample at that instant is :
Official answer
(4)
$\displaystyle 3.17 \times 10^{19}$
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