Chemistry
Give the trends in atomic size on moving :
(i) Down the group,
(ii) Across the period left to right.
Periodic Table
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Answer
(i) On moving down the group the atomic size increases as the number of valence shell increases.
(ii) On moving across the period the size of an atom decreases from left to right. This is because the nuclear charge, i.e., the atomic number increases from left to right in the same period, thereby bringing the outermost shell closer to the nucleus.
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