Question

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. $K>Mg>Al>B$

Answer 1

The correct option is D $K>Mg>Al>B$

Metallic character increases down the group and decreases along the period as we move from left to right.

We know,
Boron lies in the 13th group and 2nd period of the periodic table.

Aluminium lies in the 13th group and 3rd period of the periodic table.

Magnesium lies in the 2nd group and 3rd period of the periodic table.

Potassium lies in the 1st group and 4th period of the periodic table.

Hence, the order of metallic character is: K > Mg > Al > B.