The angular momentum in the 2nd Bohr orbit of an H-atom is . What is the angular momentum in the 1st — Atomic Structure Chemistry Question

💡 Solution & Explanation

Angular momentum $mvr = \frac{nh}{2\pi}$ depends only on the principal quantum number $n$. For the 2nd orbit of H, $n=2$. For the 1st excited state of $Li^{2+}$, $n=2$ as well. Since $n$ is identical, the angular momentum remains exactly $x$.