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Periodic Table and Periodicity: Atomic radius trend MCQ

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Atomic radius trendEasyQuestion 840003

Question

Atomic radius across a period (left to right) generally:
  1. A
    Decreases due to increasing nuclear charge
    Correct
  2. B
    Increases
  3. C
    Remains constant
  4. D
    First increases then decreases

Correct answer

Decreases due to increasing nuclear charge

Explanation

Across a period: nuclear charge increases, electrons are added to the same shell, increased Zeff pulls electrons closer → atomic radius decreases from left to right.

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