Answers

2016-03-17T01:32:48+05:30
The softness of the alkali metals increases down the group because of the increasing atomic size of the elements and loosing packing efficiency(68%)

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can u give someone explanation
I mean some more explanation
2016-03-17T17:46:47+05:30
The atomic radius start increasing , so he force of attraction decreases thereby making elements down a group soft
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