What is the radius of the first Bohr orbit of this atom? — Atomic Structure Chemistry Question

💡 Solution & Explanation

Bohr radius $r \propto 1/m$. The mass of the muon is 207 times that of an electron. Thus, $r = \frac{52.9 \text{ pm}}{207} \approx 0.2555 \text{ pm} \approx 0.256$ pm. Therefore, correct answer is B.