Question

The total number of subshells is equal to the shell index number.

• A. True
• B. False

Answer 1

The correct option is A True

The "n" is a quantum number (index number) tells us not only which level, but how many subshells are possible.

If "n" $=$ 1, there is only one possible subshell (1s)

If "n" $=$ 2, there are two possible subshells (2s, 2p)

Any "n" can only contain that many possible subshells