Arkansas State Barber Practice Exam

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What is an example of an elemental molecule?

Oxygen
Aluminium foil
Water
Carbon dioxide

The correct answer is: Aluminium foil

While it may seem that the correct answer could be A or C, both oxygen and water are more accurately described as elemental molecules when they are in their pure form. Aluminium foil, or Al, on the other hand, is a molecule that is composed of only one type of atom - aluminium. Therefore, it is an example of an elemental molecule. Carbon dioxide, or CO2, is a compound made up of multiple elements (carbon and oxygen), making it not an elemental molecule.