On moving from left to right across a period in the periodic table the metallic character

On moving from left to right across a period in the periodic table the size of the atom generally:

In the periodic table, the metallic character of elements

In the periodic table, the metallic character of elements

On moving from left to right in a period in the periodic table, the size of the atom.

On moving from left to right in a period in the periodic table, the size of the atom.

To changes in the properties of elements on moving from left to right across a period of the Periodic Table. For each property, change the letter corresponding to the correct answer from the choices. The non-metallic character of the elements :

Give reasons why ? The oxidizing nature of elements increases on moving from left to right along a period in the periodic table.