Can someone please answer this question

4

Explanation: Count the blue ones and there are 4. hope this helps :)

if two electrons have the same n, the same ℓ, and the same ml, then they are in the same orbital. the pauli exclusion principle states that no two identical fermions (a fancy word for electrons and other subatomic particles like electrons) may occupy the same quantum state in an atom simultaneously.

wher is the rest of the question