The number of orbitals associated with quantum numbers

Question:

The number of orbitals associated with quantum numbers $n=5, m_{s}=+\frac{1}{2}$ is:

  1. 11

  2. 25

  3. 50

  4. 15


Correct Option: , 2

Solution:

The possible number of orbitals in a shell in term of ' $n$ ' is $n^{2}$

$\therefore n=5 ; n^{2}=25$

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