If the radius of first orbit of H–atom is Å, then the radius of the second orbit of Li ion will be — Atomic Structure Chemistry Question

💡 Solution & Explanation

Radius $r = r_1 \frac{n^2}{Z} = x \frac{n^2}{Z}$. For second orbit of Li$^{2+}$ ($n=2, Z=3$), $r = x \frac{2^2}{3} = \frac{4x}{3}$ Å. Therefore, correct answer is B.