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Which consequence results when electron shielding is compromised in a catalyst?

A)Increased catalytic reaction rate occurs
B)Decreased catalyst thermal stability occurs
C)Changes to Fermi level result
D)Reduced product selectivity observed

💡 Explanation

If electron shielding is compromised, the effective nuclear charge increases causing a smaller atomic radius due to increased positive charge attracting the electron orbitals via Coulomb attraction; therefore catalytic activity increases, rather than decreases in activity which would arise from orbital expansion.

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