Metallic Character

Q.

Why does non-metallic character increase on moving from left to right in a period?

Q. Considering the elements $B,Al,Mg$ and $K$, the correct order of their metallic character is:

1. $K>Al>Mg>B$
2. $Mg>Al>B>K$
3. $Mg>Al>K>B$
4. $K>Mg>Al>B$

Q. Considering the elements $B,Al,Mg$ and $K$, the correct order of their metallic character is:

1. $K>Al>Mg>B$
2. $Mg>Al>B>K$
3. $Mg>Al>K>B$
4. $K>Mg>Al>B$