In two hydrogen atoms A and B, the electrons are revolving round the nucleus in circular orbits of r — Atomic Structure Chemistry Question

💡 Solution & Explanation

The radius of a Bohr orbit is proportional to $n^2$. Since $r_A/r_B = 1/4$, we have $n_A/n_B = 1/2$. The time period $T$ is proportional to $n^3$. Thus, the ratio $T_A/T_B = (1/2)^3 = 1/8$. Therefore, correct answer is C.