Question

write how properties vary on moving down the group and across the period in modern periodic table give reason for the same

Answer 1

In modern periodic table, the number of periods is 7 an d the number of groups is 18.

a- when we move across the period, i.e, from left to right, the metallic character of an element decreases as metals tend to lose electrons and are electropositive.

b- if we move down the group, it increases

Explanation:

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