Question

which list only includes terms that describe oxygen gas, 0_2?
a. atom, element, molecule
b. compound, molecule, pure substance
c. atom, compound, molecule
d. element, molecule, pure substance

Answers

GPT-4o mini
The correct answer is **d. element, molecule, pure substance**.

- **Element**: Oxygen (O) is an element, and O₂ is a diatomic molecule of that element.
- **Molecule**: O₂ is a molecule because it consists of two atoms of oxygen bonded together.
- **Pure substance**: O₂ is considered a pure substance since it has a uniform composition throughout.

The other options do not accurately describe oxygen gas specifically.