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The correct decreasing order of atomic radii (pm) of Li, Be, B and C is
A
Be > Li > B > C
B
Li > Be > B > C
C
C > B > Be > Li
D
Li > C > Be > B
Detailed Solution
As the atomic number increases across a period, the effective nuclear charge increases, so atomic radii decrease along the period. Correct decreasing order: $Li>Be>B>C$.