Final answer:
The chemical compound N2O4 is known as dinitrogen tetroxide, named based on the number of nitrogen and oxygen atoms present.
Step-by-step explanation:
The compound with the chemical formula N2O4 is named dinitrogen tetroxide. In naming this compound, nitrogen (N) is listed first because it is to the left of oxygen (O) in the periodic table, indicating its presence in the compound before oxygen. The prefix 'di-' is used because there are two nitrogen atoms, and the prefix 'tetra-' is used (shortened to 'tetro' for ease of pronunciation) because there are four oxygen atoms. Following chemical naming conventions, 'oxide' indicates the presence of oxygen in the molecule. Therefore, putting these parts together yields the name dinitrogen tetroxide for N2O4.