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Per NCERT §3.7.1(b), why is an ANION LARGER than its parent neutral atom?
AAnions absorb light
BAnions have more protons
CAnions vibrate more strongly
DAdding electron(s) increases e–e repulsion and decreases effective nuclear charge → expansion
Answer & Solution
Correct answer: D. Adding electron(s) increases e–e repulsion and decreases effective nuclear charge → expansion
Per NCERT §3.7.1(b), anion = extra e⁻ with same Z → greater e–e repulsion, lower Z_eff → larger r. F (64 pm) vs F⁻ (136 pm).
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