OnlineCBT
Chemistry · Structure of atom
हिन्दीGiven below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).\n Assertion (A): An orbital cannot hold more than two electrons, and these two electrons must have opposite spins.\n Reason (R): According to the Pauli exclusion principle, no two electrons in an atom can have the same set of all four quantum numbers. \nIn the light of the above statements, choose the correct answer from the options given below:
Correct answer · Option 1
Both (A) and (R) are true and (R) is the correct explanation of (A).
Explanation
Since three quantum numbers (\( n, l, m_l \)) define an orbital, only two electrons can occupy it with opposite spin quantum numbers (\( m_s = +\frac{1}{2} \) and \( -\frac{1}{2} \)) to satisfy the exclusion principle.
