Question

for n=2, the total number of subshells possible are a 2 b 1 c 0 d data insufficient question 5 of 9

Explanation:

Step1: Recall subshell rule

For a principal quantum number \( n \), the azimuthal quantum number \( l \) can take values from \( 0 \) to \( n - 1 \). Each value of \( l \) corresponds to a subshell.

Step2: Calculate \( l \) for \( n = 2 \)

When \( n = 2 \), \( l \) can be \( 0 \) and \( 1 \) (since \( l = 0, 1 \) for \( n - 1 = 1 \)). So there are 2 subshells ( \( l = 0 \) is \( s \)-subshell, \( l = 1 \) is \( p \)-subshell).

Answer:

A. 2