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Q.

In the main group elements (i) as we proceed down the same group in the periodic table and (ii) as we proceed from ieft to right in the same period. the atomic radius

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a

(i) Increase continuously; (ii) Decreases continuously

b

(i) Decreases continuously; (ii) Increases continuously

c

(i) Increases continuously; (ii) Decreases upto the group IV and then increases upto the end of the period

d

(i) Decreases continuously; (ii) Decreases upto the group IV and then increases upto the end of the period

answer is D.

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Detailed Solution

Size of elements decreases across a period as nuclear charge increases and increases down the group as no. of electrons increases.
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