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(i) How does the tendency to gain electr...

(i) How does the tendency to gain electrons change as we go down the group ? Give reason.
(ii) Given below is a part of the periodic table. How does the valency vary, as we move vertically downward from Li to Fr. Give reason.

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(i) Tendency to gain electrons decreases on moving down the group because with increase in size, effective .+ve. nuclear charge decreases.
(ii) Valency remains constant as we move downwards. Elements of the same group have the same number of valence electrons.
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