Explain why the atomic size of elements increases from top to bottom in a group.
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6
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More and more electrons are added to same shell. The attraction between nucleus and valence electrons increases with increase in the atomic number. On moving down the group, from top to bottom, the atomic size increases. This is because with increase in the atomic number, extra shells of electrons are added.
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1
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the no. of shells increases as we move top to bottom. hence atomic radius increases and atomic size also increases relatively.
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