Which of the following factors does not effect the metallic character of an element?

When an element shows properties like loosing electrons easily, getting reduced easily, formation of ionic halides and basic oxides and has the ability to displace hydrogen from dilute acids, it is considered to be a metal. Metallic character decreases across a period. This occurs because atoms accept electrons more readily to fill the valence shell than loosing one. Metallic character increases while moving down a group because atoms lose electrons more easily because of the increase in the atomic radii, resulting in decrease in the attraction between nucleus and valence electrons.