Which of the following set of elements is written in order of their increasing metallic character?
(a) Be, Mg, Ca
(b) Na, Li, K
(c) Mg, Al, Si
(d) C, O, N
Answer
As we move down the group , metallic character (ability to donate electrons) increases .
- Option (a) - Be, Mg and Ca all belong to group 2 and are arranged according to increasing metallic character.
- Option (b) - Na, Li and K belong to the same group however they are not arranged in the order of increasing metallic character.
- Option (c) - Mg, Al, Si belong to different groups.
- Option (d) - C, O and N also belong to different groups.
Therefore, the correct option is (a) Be, Mg and Ca
