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Which outcome occurs when a Rydberg atom's orbital expands?

A)Increased sensitivity to external fields
B)Suppressed spontaneous radiative decay
C)Decreased fine structure splitting
D)Enhanced core penetration effects

💡 Explanation

Increased sensitivity occurs because Rydberg atoms exhibit exaggerated responses to external fields due to electronic orbital size leading to large dipole moments via the mechanism of electric field susceptibility; therefore sensitivity increases, rather than suppressed radiative decay as occurs with Lamb shifts.

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