Yes, the element Carbon is a non-metalelement.
Coal is not an element, it is a substance, but it definitely doesn't look to be a metal: black, not shiny mirroring in light, not malable, ... etc.
Carbon, obviously.
nonmetal
Nails are metal.
ionic = metal + nonmetal covalent = nonmetal + nonmetal So your compound is covalent because P (Phosphorus) is a nonmetal and O (oxygen) is a nonmetal.
Nonmetal
nonmetal
it is a nonmetal.
Nonmetal.
nonmetal
Carbon is a nonmetal. Thus this is a nonmetal oxide.
It is a nonmetal.
A nonmetal.