Question

Question 3.38 Considering the elements B, Al, Mg, and K, the correct order of their metallic character is:

(a) B > Al > Mg > K

(b) Al > Mg > B > K

(c) Mg > Al > K > B

(d) K > Mg > Al > B

Class XI Classification of Elements and Periodicity in Properties Page 95

Answer 1

K > Mg > Al > B metallic Character of the increases on moving down the group and decrease on going across a period from left to right.

Answer 2

concept : In group, metallic character increases from the top to bottom as ionisation energy decreases.
but In period, metallic character decreases from left to right as tendency to lose electron decreases { ionisation energy increases }.

Here, B, Al , Mg , K are given.

order of metallic character is K > Mg > Al > B