Ozone is an allotrope of oxygen. It is a non-metal. Oxygen when compressed to very high pressures forms a dense metallic state. Presumably ozone can enter a similar metallic state at high pressures.
nonmetal
Nails are metal.
nonmetal
Is ceramic metal or nonmetal
Metal is metal. Nonmetal is everything else.
it can be a metal or nonmetal or metalliods
Metal - metal compounds don't exist... Only metal-nonmetal and nonmetal-nonmetal
nonmetal
Nonmetal
nonmetal
Nonmetal.
Nonmetal