Kemija - 2023. jesen, 15.

${\mathrm{B}\mathrm{F}}_3\backslash mathrm\{BF\}\_\{3\}$

${\mathrm{S}\mathrm{O}}_3\backslash mathrm\{SO\}\_\{3\}$

${\mathrm{P}\mathrm{C}\mathrm{l}}_3\backslash mathrm\{PCl\}\_\{3\}$

${\mathrm{C}\mathrm{O}}_3^{2-}\backslash mathrm\{CO\}\_\{3\}^\{2-\}$