Question

a molecule of carbon dioxide is made up of one carbon (c) atom and two oxygen (o) atoms. which of the following models represents carbon dioxide (co₂)?

Explanation:

Carbon dioxide ($CO_2$) has one carbon atom and two oxygen atoms. Model D has three atoms: one different - colored atom (representing carbon) and two same - colored atoms (representing oxygen), which matches the composition of $CO_2$. Model A has two same - colored atoms (like $O_2$ or $N_2$), Model B has two different - colored atoms (like $CO$), and Model C has two same - colored atoms (similar to Model A).

Answer:

D.