Kemija - 2012./13. ljeto - 27.

A. ${\mathrm{S}\mathrm{O}}_2\backslash mathrm\{SO\}\_\{2\}$

B. ${\mathrm{N}\mathrm{H}}_3\backslash mathrm\{NH\}\_\{3\}$

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

D. ${\mathrm{H}}_2\mathrm{S}\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{S\}$