Question

No two electrons in an orbital can
have parallel spin. This statement
emerges from
​

Answer 1

Answer:

The given statement is emerged from the famous "Pauli exclusion principle".

Explanation:

Pauli exclusion principle states that no two electrons can have the same four electronic quantum numbers. And electron spin is one of the quantum numbers. This means that they can have the same n, l and m but not ms.  An orbital can have a maximum of two electrons with opposite spins which means if one electron is moving clockwise and other will move in anti clock wise direction. Since the electrons have negative charges so they will repel each other and thereby move in opposite direction. This maintain structural integrity of the orbital and their opposite spins satisfy the Pauli exclusion principle.

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