Which of the following orbital does not exist according to quantum theory? — Atomic Structure Chemistry Question

💡 Solution & Explanation

For a given principal quantum number $n$, the maximum allowed value for $l$ is $n-1$. For a 5h orbital, $n=5$ and $l=5$ (s=0, p=1, d=2, f=3, g=4, h=5). Since $l$ cannot equal $n$, the 5h orbital cannot exist. Therefore, correct answer is C.