The order of metallic character of elements A, B, C and D is

D>A>C>B


(i) What is the order of their electronegative character?


(ii) What is the nature of oxide of B If oxide of A is amphoteric?

(i) As the metallic character decreases, the tendency to loose valence electrons also decreases. In other words the tendency to gain electron increases, so their electronegative character increases:

Order: D<A<C<B


(ii) Since the element B has least metallic character, so it will have maximum non-metallic character in it. Non-metal oxides are acidic in nature, therefore oxide of B will be acidic in nature.


16