There are several compounds containing nitrogen and hydrogen, but the most common and important one is ammonia (NH₃).

Here are a few others:

* Hydrazine (N₂H₄): A highly reactive and toxic compound used as a rocket fuel.

* Hydroxylamine (NH₂OH): A colorless, unstable compound used in various chemical processes.

* Nitrogen hydrides (N₂H₂, N₃H₅): Less common and highly unstable compounds.

It's important to note that the specific properties and applications of these compounds vary significantly.