Kemija - 2024. probna, 4.

${\mathrm{C}\mathrm{l}}^{-}\backslash mathrm\{Cl\}^\{-\}$

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

${\mathrm{N}\mathrm{a}}^{+}\backslash mathrm\{Na\}^\{+\}$

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