The best statement that describes the substances N2 (nitrogen gas) and NO2 (nitrogen dioxide) is:
Both are molecules. NO2 is also a compound.
This is because:
- N2 is a molecule made up of two nitrogen atoms and is an element because it consists of the same type of atom.
- NO2 is a molecule made up of nitrogen and oxygen atoms and is a compound because it consists of more than one type of element.