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Per NCERT Table 3.6(a), how does the atomic radius of Period-II elements change from Li (152 pm) to F (64 pm)?
ADoubles between B and C
BIncreases by 20 pm at each step
CDecreases steadily: Li 152 → Be 111 → B 88 → C 77 → N 74 → O 66 → F 64 pm
DStays the same
Answer & Solution
Correct answer: C. Decreases steadily: Li 152 → Be 111 → B 88 → C 77 → N 74 → O 66 → F 64 pm
Per NCERT Table 3.6(a), Li 152 → Be 111 → B 88 → C 77 → N 74 → O 66 → F 64 pm. Steady decrease across the period.
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