Which group of atoms have nearly same atomic radius (1) \( \mathrm{...

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Which group of atoms have nearly same atomic radius
(1) \( \mathrm{Na}, \mathrm{K}, \mathrm{Rb}, \mathrm{Cs} \)
(2) \( \mathrm{Li}, \mathrm{Be}, \mathrm{B}, \mathrm{C} \)
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(3) \( \mathrm{Fe}, \mathrm{Co}, \mathrm{Ni} \)
(4) \( \mathrm{F}, \mathrm{Cl}, \mathrm{Br}, \mathrm{I} \)
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