1. a molecule, a compound and a mixture
2. a molecule, a compound and a pure substance
3. an atom, an element and a pure substance
4. an atom, an element and a mixture
5. a molecule, element and a pure substance
6. an atom, a compound and a mixture

thank you thank you thank you thank you =]]]] <33

4.

Uh, Lady Godiva is wrong.

edit: Steven is right. He gets a gold star.

Carbon monoxide(CO) is a molecule made from Carbon and Oxygen that are covalently bonded (dumbed down covalently bonded means the sharing of pairs of electrons-if you do not know what electrons are, they are just electricity) between atoms.

So, there is not a category for CO to go in based on what you provided. CO is a molecule (compound) made from atoms and electrons.

CO2 is something you should look up for yourself and stop asking people to do your homework for you.

the answer is 2.and its CO kiltze not CO2.hence carbon monoxide and not dioxide.