Across Period 3 from sodium ($\text{Na}$) to chlorine ($\text{Cl}$), which statement correctly describes the changes in the shielding effect and the effective nuclear charge ($Z_{\text{eff}}$) experienced by the valence electrons?

A) Shielding increases significantly while the effective nuclear charge remains constant.

B) Shielding remains approximately constant while the effective nuclear charge increases.

C) Shielding decreases significantly while the effective nuclear charge increases.

D) Both shielding and the effective nuclear charge decrease across the period.

Effective nuclear charge and shielding Knowledge-Based Practice

Chemistry · The Periodic Table · Chemistry · Periodic Trends

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