Topic: Quantum numbers and shapes of s, p, d orbitals· Atomic Structure

Two electrons occupying the same orbital are distinguished by :

1. Principal quantum number

2. Magnetic quantum number

3. Azimuthal quantum number

4. Spin quantum number

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Answer: 4. Spin quantum number

Key idea: two electrons in the same orbital have the same n, l and m. By the Pauli exclusion principle they must differ in spin (+1/2 and -1/2). So they are distinguished by the spin quantum number.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

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Two electrons occupying the same orbital are distinguished by :

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