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← ScienceWhich mechanism causes paramagnetism in molecules with unbound electrons?
A)Unpaired spin orbital alignment✓
B)Excited state vibrational modes
C)Nuclear magnetic resonance shielding
D)Increased effective nuclear charge
💡 Explanation
Unpaired electrons in molecular orbitals cause paramagnetism because they align their spins when an external field is applied due to Hund's rule; therefore spin orbital alignment increases magnetism, rather than vibrational modes or shielding changes, which do not result in this attraction.
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