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How does the atomic radius change as we go :(i) from left to right across a period(ii) down a group in the periodic table ? |
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Answer» On going: (i) From left to right across a period, atomic radius decreases as one proton and one electron are added continuously, therefore effective nuclear charge increases. (ii) down a group in the periodic table, atomic radius increases because the number of shells goes on increasing, therefore, the distance between nucleus and valence shell increases |
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