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Periodic Table Ionization Energy Trend

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The first ionization energy generally decreases down a group mainly because of an increase in: (1) Atomic radius (2) Nuclear charge (3) Electron affinity (4) Number of shielding electrons

Verified Answer & Explanation⌄

Correct Answer: B) (1) and (4)

Concept Explanation

Down a group, atomic radius and shielding increase, reducing the effective attraction between the nucleus and the outer electron.

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