Kemija - 2009./10. ljeto - 9.

A. ${\mathrm{B}\mathrm{e}\mathrm{F}}_2\backslash mathrm\{BeF\}\_\{2\}$

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

C. ${\mathrm{H}}_2\mathrm{O}\backslash mathrm\{H\}\_\{2\}\; \backslash mathrm\{O\}$

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