Question

Metals conduct electricity but non metals don't.why?

Answer 1

We know that metals have a tendency to lose electrons. Thus, metals are actually an orderly collection of positive ions surrounded by and held together by their valence electrons, present as free electrons. These electrons are mobile and are evenly spread out throughout the crystal. Each metal atom contributes one or more electrons towards this sea of mobile electrons. These free and mobile electrons are responsible for high thermal and electrical conductivity of metals.