How are electronegativity and metallic & non-metallic characters related?

Explanation

Electronegativity provides a means of predicting the nature of elements. Electronegativity is directly related to the non metallic character of elements and inversely related to the metallic character of elements.
The electornegativity increases across a period from left to right. So metallic character decreases and non-metallic character increases.
In group electronegatvity decreases from top to bottom. so the metallic character increases down and the non-metallic character increases.