Question

drag the missing word into place
carbon and oxygen bond to form carbon dioxide, a
compound
mixture
solution

Explanation:

Carbon dioxide ($\ce{CO_2}$) is formed when carbon and oxygen atoms chemically bond in a fixed ratio (1 carbon to 2 oxygens). A compound is a substance made of two or more different elements chemically combined in a fixed ratio. A mixture is a combination of substances not chemically bonded, and a solution is a type of mixture (solute dissolved in solvent). Since $\ce{CO_2}$ has a fixed chemical composition from bonded elements, it is a compound.

Answer:

compound