Oxides of Nitrogen

Besides combining with hydrogen and forming NH₃ , nitrogen combines with oxygen in different ratios and forms five different oxides.
The oxides of nitrogen and the details of the oxygen states of nitrogen and the N:O ratio can be presented in a tabular form as:

Name	Formula	Oxidation state of N	Ratio of N:O
Nitrogen Oxide or nitrous oxide	NO	+2	1:1
Nitrogen dioxide	NO2	+4	1:2
Nitrous oxide (Laughing gas)	N2O	+1	2:1

All of these oxides of nitrogen are gases, excepting NO and N₂O the other oxides are brownish gases.
Except the oxides of NO and N2O all the other oxides are acidic. NO and N₂O are neutral.
The other oxides are prepared in the laboratory using different methods characteristic to each oxide.