how can say whether an element is metal or non metal based on electronic configuration of that element?

how can say whether an element is metal or non metal based on electron

1.	how can say whether an element is metal or non metal based on electronic configuration of that element?
Answer» tion:Metals are elements that give off “free” electrons. Metals generally have ANYWHERE between 1 to 3 electrons excess of a closed shell. Non-metals on the other HAND have similar NUMBER of electrons in deficit of the NUMBERS required for a closed shell. That is deficit in between 1 to 3 electrons