Question

How many electrons will be present in the subshells having $m_s$ value of $-1/2$ for $n=4$?

• A. 10
• B. 12
• C. 14
• D. 16

Answer 1

The correct option is D 16

For n = 4 value of electrons is $2n^2$ = 32

and two electrons is filled in each orbital one have $m_s$ value +1/2 and other have -1/2

So for n = 4 there are 16 orbitals and 16 electrons which have $m_s$ value is -1/2