Solve question C fast I need it

Dear student,

a) When we move down the group in the periodic table, atomic size increases. Similarly , for a same group , the cationic size increases down the group. 
Thus, Li+ < K, K+ is smaller in size

b) The ions F- and N3- are isoelectronic (same number of electrons) and belongs to the same period (Period 2). The size of such ions decreases with increase in atomic number or decreases moving from left to right or increases with the increase in the negative charge.

Thus, N3- >  F- , F- is smaller in size


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