Pls answer Q no 18 (4 and 5 pls)

Dear Student,

18(iv) The correct answer is (d)
Li and F both belong to the same period. As we move left to right across a period, atomic size decreases due to increase in nuclear charge. 

18 (v) Electronegativity increases down the group due to increase in atomic size and thus decrease in the tendency to attract electrons.
Correct answer is (c)


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