How many total subshells are possible that satisfy the condition ? — Atomic Structure Chemistry Question

💡 Solution & Explanation

The permissible subshells must have $n > l$. The possible combinations yielding 7 are: $n=7, l=0$ ($7s$); $n=6, l=1$ ($6p$); $n=5, l=2$ ($5d$); $n=4, l=3$ ($4f$). Total = 4 subshells.