Question

1.how many orbitals are associated with n=4?

2.how many electrons will be present in the subshells having ms value of -1/2 for n=4?

Answer 1

1. 4th shell we have total of (4)^2 = 16 orbitals
Now, each orbital has 2 electrons so 16*2 = 32 electrons..

2. It will be 16 ...!!
Hope this helps you....!!