Which of the statements about the behaviour of the atom is correct?

Chemistry

WAEC 2009

A. atomic size decreases down the group
B. atomic size increases across the period
C. anions are smaller than the parent atom
D. cations are smaller than the parent atom

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Correct Answer: Option D

Explanation

Cations (positively charged ions) are smaller than their parent atoms because the loss of electrons reduces electron-electron repulsion and increases the effective nuclear charge, pulling the remaining electrons closer to the nucleus.

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Which of the statements about the behaviour of the atom is correct?

Correct Answer: Option D

Explanation

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