Given below are some of the elements of first group Li, Na, K (Their atomic numbers are 3, 11 , 19 respectively and they belong to 2nd, 3rd and 4th period respectively). Arrange these in the decreasing order of metallic character exhibited by them.

Given below are some of the elements of first group Li, Na, K (Their

1.	Given below are some of the elements of first group Li, Na, K (Their atomic numbers are 3, 11 , 19 respectively and they belong to 2nd, 3rd and 4th period respectively). Arrange these in the decreasing order of metallic character exhibited by them.
Answer» Solution :All the three ELEMENTS belong to the GROUP (1) of alkali metals. SINCE the metallic character of the elements increases down a group, the decreasing order of metallic character is `KgtNagtLi.`