Arrange the following elements in the order of their decreasing metallic charcter Na, Si, Cl, Mg, Al.

Options

A. Cl `gt` Si `gt` Al `gt` Mg `gt` Na
B. Na `gt` Ma `gt` Al `gt` Si `gt` Cl
C. Na `gt` Al `gt` Mg `gt` Cl `gt` Si
D. Al `gt` Na `gt` Si `gt` Ca `gt` Mg

Answer

B

Explanation

Metals lie on the extreme left side of the periodic table. Metallic character decreases from left to right in a period
Na, Si, Cl, Mg, Al belong to same period in the order Na, Mg, Al, Si, Cl. On moving in a period from left to right, the metallic character decreases
Thus, the order of decreasing metallic character is
Na `gt` Mg `gt` Al `gt` Si `gt` Cl.