Kemija - 2015./16. jesen - 18.

A. $\mathrm{Fe}^{3+}+\mathrm{e}^{-} \longrightarrow \mathrm{Fe}^{2+}$

B. ${\mathrm{S}}^{2-}⟶\mathrm{S}+2{\mathrm{e}}^{-}\backslash mathrm\{S\}^\{2-\}\; \backslash longrightarrow\; \backslash mathrm\{S\}+2\; \backslash mathrm\{~e\}^\{-\}$

C. ${\mathrm{M}\mathrm{g}}^{2+}+2{\mathrm{e}}^{-}⟶\mathrm{M}\mathrm{g}\backslash mathrm\{Mg\}^\{2+\}+2\; \backslash mathrm\{~e\}^\{-\}\; \backslash longrightarrow\; \backslash mathrm\{Mg\}$

D. ${\mathrm{N}}_2+6{\mathrm{e}}^{-}⟶2{\mathrm{N}}^{3-}\backslash mathrm\{N\}\_\{2\}+6\; \backslash mathrm\{~e\}^\{-\}\; \backslash longrightarrow\; 2\; \backslash mathrm\{~N\}^\{3-\}$