Metallic Solids
- In these solids positive ions is surrounded by mobile free electrons and are evenly spread all over the crystal.
- Each metal atom donates one or more electrons to the group of mobile electrons which increases the electrical and thermal conductivity of the metallic elements.
- Application of electric field makes these electrons flow through the linkage of positive ions.
- Whereas application of heat to one portion of a metal makes the thermal energy spread uniformly throughout by free electrons.
- Presence of free electrons in metals makes them lustrous, malleable and ductile. For example, Cr, Fe etc.
