Question

If \( R_1 \) and \( R_2 \) are the radii of the atomic nuclei of mass numbers $27$ and $125$ respectively, then the ratio \( R_2 : R_1 \) is

• A. \( \frac{125}{27} \)
• B. \( \sqrt{\frac{125}{27}} \)
• C. \( \frac{5}{3} \)
• D. \( \frac{3}{5} \)

Hint:

- Nuclear radius $\propto A^{1/3}$ - Always reduce numbers to perfect cubes

Answer 1

The Correct Option is C