Choose the incorrect trend in the atomic radii (r) of the elements : [2025]

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Solution

Q.
Choose the incorrect trend in the atomic radii (r) of the elements : [2025]

1 $r_{Br} < r_{K t}$

2 $r_{Mg} < r_{Al}$

3 $r_{Rb} < r_{Cs}$

4 $r_{At} < r_{Cs}$

Ans.
(2)

From left to right across a period, atomic radius decreases, so $r_{Al} < r_{Mg}$ .

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