Considering the elements B, AI, Mg and K, the correct order of their metallic character is:

Options

A. B>Al>Mg>K
B. Al>Mg >B>K
C. Mg >Al>K>B
D. K>Mg>Al>B

Answer

d

Explanation

In a period, metallic character decreases as we move from left to right. Therefore, metallic character of lt Mg and Al decreases in the order. K gt Mg gt Al. However, within a group, the metallic character, increases from top to bottom. Thus, Al is more metallic than B. Therefore, the correct sequence of decreasing metallic character is K gt Mg AlgtB, i.e.. option (d) is correct.