The atomic radius of elements of which of the following series would be nearly the same
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a
Na K Rb Cs
b
Li Be B C
c
Fe Co Ni Cu
d
F Cl Br I
answer is C.
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Detailed Solution
Fe, Co. Ni. Cu . Due to shielding of d-electrons. the effect of increased nuclear charge due to increase in atomic no. neutralised. Consequently atomic radius remains almost unchanged after chromium.