Question

(a) How does the electropositive character of elements change on going down in a group of the periodic table ?

State how the valency of elements varies (i)in a group, and (ii)in a period, of the periodic table.

Answer 1

(a) On going down in a group of the periodic table, the electropositive character of elements increases.

(b) (i) In a group, all the elements have the same valency.

(ii) In a period, on moving from left to right, the valency of elements first increases from 1 to 4 and then decreases to zero.