Question

the number of 2p electrons having spin quantum number s=-1/ 2 are

Answer 1

only one because in 2p orbital only 2electron present with opposite spin +1/2 and -1/2

Answer 2

The answer is 3. There are totally six electrons in the orbitals px , py and pz. 3 will have clockwise spin and 3 will have anti clockwise spin.