Kemija - 2019. ljeto, 6.

${\mathrm{C}\mathrm{H}}_4\backslash mathrm\{CH\}\_\{4\}$

${\mathrm{P}\mathrm{b}\mathrm{I}}_4\backslash mathrm\{PbI\}\_\{4\}$

${\mathrm{S}\mathrm{F}}_4\backslash mathrm\{SF\}\_\{4\}$

${\mathrm{S}\mathrm{n}\mathrm{C}\mathrm{l}}_4\backslash mathrm\{SnCl\}\_\{4\}$