How does the atomic size vary on we move from (i) left to right is a period (ii) Top to bottom in a group give reasons for these variations
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Answer:
on moving left to right it decreases and from top to bottom ot increases.
Explanation:
left to right no of electrons in an atom inc. but no. of shells remain same .. so e and nucleus attraction force inc..whereas in moving from top to bottom no. of shells inc. and no electrons also inc.. but the size inc so much due to more no. of shells that size factor domiates inc in electrons
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