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

Options

A. BltAlltMgltK
B. BltMgltAlltK
C. MgltBltAlltK
D. MgltAlltBltk

Answer

A

Explanation

(A) Electronegativity decreases and hence the metallic character increases with in a group from top to bottom (i.e., Al is more metallic than B). Further electronegativity increases and hence the metallic character decreases from left to right along a period (i.e, metallic character decreases in the order : KgtMggtAl). Thus the overall metallic character of four elements increases in the order BltAlltMg ltK