question_answer 62)

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

Answer:

                  Arranging the given elements into different groups and periods in order of there increasing atomic numbers. So, we have Group number  121814 Third period :?Mg ?? Fourth period :K CaGaGe Since, the metallic character decreases along a period from left to right, therefore, metallic character increases in the order: Ge < Ga < Ca < K (as all these belong to same period). Now we compare the metallic character of Ca and Mg. Since, metallic character increases down the group from top to bottom, therefore, Ca is more metallic than Mg. Combining the above two results, the overall metallic character increases in the order Ge < Ga < Mg < Ca < K.