26302
The chi aa ( N ) values for the two isomers of protonated nitrous oxide are qualitatively consistent with the valence bond description of H - N = N ( + ) = O for the electronic structure of the nitrogen - protonated form and N = N ( + ) - O - H for the oxygen - protonated form .
 Chemical: N; Chemical: protonated nitrous oxide; Chemical: H - N = N ( + ) = O; Chemical: nitrogen; Chemical: N = N ( + ) - O - H; Chemical: oxygen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: N; Chemical: protonated nitrous oxide; Chemical: H - N = N ( + ) = O; Chemical: nitrogen; Chemical: N = N ( + ) - O - H; Chemical: oxygen