First slide

Size of nucleus

Question

The ratio of the radii of the nuclei $_{13} A l^{27}$ and $_{54} T e^{125}$ is

Easy

A

$\sqrt{13} : \sqrt{52}$
B

$2 \sqrt{13} : 3 \sqrt{52}$
C

$3 \sqrt{3} : 5 \sqrt{5}$
D

3 : 5

Solution

$r α A^{1 / 3}$
$(\frac{r_{1}}{r_{2}}) = {(\frac{27}{125})}^{1 / 3} = 3 : 5$

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