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Which consequence results when electron correlation increases in helium atom orbitals?

A)Increased ionization energy required
B)Decreased electron shielding occurs
C)Diamagnetic susceptibility increases sharply
D)Effective nuclear charge decreases steadily

💡 Explanation

Increasing electron correlation causes effective nuclear charge experienced by each electron to decrease because electrons spend more time further apart due to the Coulomb repulsion; therefore, the effective nuclear charge decreases, rather than ionization energy increasing like it would under different conditions.

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