Name for the compound n2o4 in prefix form?

Answer 1

You can call it either dinitrogen tetroxide or, like NASA does, just nitrogen tetroxide. This is neat stuff: if you mix it with hydrazine it will immediately ignite, which means you can simplify the design of your next rocket - no ignition system is needed, just pump some of each chemical into the engine and off you go. Right now.

Answer 2

Prefix form makes use of specific prefixes to indicate the number of atoms in the compound. N2O4 is then dinitrogen tetraoxide.