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-- 7. The radius of nuclei X is measured to be twice the radius of nuclei Y. The ratio of nucleons in X to Y is
A
8 : 1
B
2 : 1
C
1 : 4
D
1 : 1
Explanation
R ∝ A¹/³. If R_x = 2R_y, then (A_x/A_y)¹/³ = 2 => A_x/A_y = 2³ = 8. Ratio is 8 : 1.
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