11. I would say physical because the color of the item is changed and the texture and density is changed aswell.
Metal atoms have outer electrons which are not tied to any one atom. These electrons can move freely within the structure of a metal when an electric current is applied. There are no such free electrons in covalent or ionic solids, so electrons can't flow through them - they are non-conductors.
In a shorter term - no
C. Formation of a new substance
Answer: 4) Concentrate it
Explanation:
