The speed of electron in H-atom is directly proportional to — Atomic Structure Chemistry Question

💡 Solution & Explanation

Speed $v \propto \frac{1}{n}$. Radius $r \propto n^2 \implies n \propto \sqrt{r}$. Substituting $n$, we get $v \propto \frac{1}{\sqrt{r}}$. Therefore, correct answer is D.