A covalent bond or a hydrogen bond. See the Related Questions to the left for more information.
Nitrogen and hydrogen are both gases. Nitrogen is inert that is you cant get a fire going with it, however hydrogen is very explosive when mixed with oxygen, another gas and lit,
covalent
There are many compounds containing Nitrogen and Hydrogen like Ammonia, Ammonium Chloride, Ammonium Hydroxide etc.
The result it a common base called ammonia.
Nitrogen, has a atomic weight roughly 14 times heavier then that of hydrogen.