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Solve the following.
Given two nuclei and . Calculate the ratio of the radii.
Given two nuclei $^{64}_{29}\text{Cu}$ and $^{27}_{13}\text{Al}$.
Calculate the ratio of the radii.
Answer
Answer
Official answer key$R \propto A^{1/3}$
$\frac{r_1}{r_2} = \frac{64^{1/3}}{27^{1/3}}$
$\frac{r_1}{r_2} = \frac{4}{3}$
$r_1 : r_2 = 4:3$
Final answer: 4:3
From ISC 2025 Practice Physics, question 82(a).
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