Kemija - 2022./23. probna - 11.

${\mathrm{S}}^{2-}\backslash mathrm\{S\}^\{2-\}$

${\mathrm{C}\mathrm{a}}^{2+}\backslash mathrm\{Ca\}^\{2+\}$

${\mathrm{M}\mathrm{g}}^{2+}\backslash mathrm\{Mg\}^\{2+\}$

${\mathrm{O}}^{2-}\backslash mathrm\{O\}^\{2-\}$