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← ScienceWhich outcome occurs when diatomic molecule bond length decreases?
A)Antibonding orbital energy level decreases
B)Zero net effect on orbital energies
C)Increase in vibrational frequency✓
D)Reduced overall molecular dipole moment
💡 Explanation
The vibrational frequency increases due to an increased effective spring constant during stronger bonding, because the potential energy well becomes steeper due to the stronger interactions. Therefore, vibrational modes increase, rather than the individual electron energy levels directly changing under compression.
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