Answers

2016-03-17T23:13:59+05:30
On moving down the group atomic size increases so the nuclear pull decreases. Naturally softness increases
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2016-03-18T05:32:03+05:30
On moving down the group a new shell is progressively added although,the nuclear charge also increase down the group but effective of additional of new shell is more predominant due to increase screening effect of inner filled shell on the valence s electrons.hence the atomic size increase in group
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