Arrange the following elements in the increasing order of their metallic character Mg, Ca, K, Ge, Ga.

Explanation

The arrangement of given elements in the Modern Periodic table is listed below :

We know that metallic character decreases from left to right in the periodic table. In the given elements, excluding Mg, remaining elements are placed in same period so the metallic character will decrease from K to Ge and order of metallic character would be,
`Ge lt Ga lt Ca lt K`
Now, as we move down in a group, metallic nature of elements increases. So, Ca is more metallic than Mg. Similarly, Mg will be less metallic than K because in period, metallic nature decreases from left to right. Hence the increasing order of metallic character would be,
`Ge lt Ga lt Mg lt Ca lt K`