Nitrogen through Bismuth, the Pentels

Dihydrogen. Nascent hydrogen with compounds of N usually forms NH3, always the ultimate product in an alkaline solution. 

The radius of NH/ is close to that of K , but NH/ salt solubilities resemble more those of Rb and Cs . We cannot isolate neutral NH4, however, as we can metallic Aik. 

Diazane (hydrazine), N2H4, is a colorless, hygroscopic liquid. Like sulfuric acid, N2H4 reacts vigorously with H2O when diluted. It is decomposed by heating into N2 and NH3. The monohydrate and solutions are much more stable than the anhydrous hydride. 

Hydroxylamine, NH2OH, the thermodynamically strongest nitrogen reductant, going to N2, is unstable, decomposing slowly at ambient T. An aqueous solution reacts alkaline and soon decomposes  

Therefore NH2OH is generally used as the salts NH3OHCI, (NH30H)2S04, or NH3OHNO3, which are more stable although less soluble in water than the base itself. 

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