Kemija - 2014./15. jesen - 17.

${\mathrm{N}}_2\mathrm{O}\backslash mathrm\{N\}\_\{2\}\; \backslash mathrm\{O\}$

$\mathrm{N}\mathrm{O}\backslash mathrm\{NO\}$

${\mathrm{N}\mathrm{O}}_2\backslash mathrm\{NO\}\_\{2\}$

${\mathrm{N}}_2{\mathrm{O}}_5\backslash mathrm\{N\}\_\{2\}\; \backslash mathrm\{O\}\_\{5\}$