The average and the most probable distance from the nucleus for 1s electron in hydrogen atom are, re — Atomic Structure Chemistry Question

💡 Solution & Explanation

For a 1s orbital in a hydrogen atom, the most probable distance (peak of the radial probability function) is $a_0$. The quantum mechanical average distance (expectation value $\langle r \rangle$) is $\frac{3}{2}a_0 = 1.5 a_0$. Therefore, correct answer is C.