Question

Students are learning about the differences between elemental molecules and compounds in class. They create four models to represent elemental molecules and compounds. The four models are shown in the image.



image.png



A gas contains oxygen (O2) and carbon dioxide (CO2). Which model MOST LIKELY represents the composition of the gas?


Model One


Model Two


Model Three


Model Four

Answer 1

I can't see the image you uploaded. Could you either re-upload it or briefly describe the four models (what colors/number of atoms are in each group)?

If you want the quick rule to use: pick the model that shows both
- diatomic molecules made of two identical atoms (O2), and
- triatomic molecules made of two atoms of one kind bonded to a different central atom (O–C–O for CO2).

If you describe the models I’ll tell you exactly which number matches.