Kemija - 2024. ljeto, 14.

${}^{14}\mathrm{N}\mathrm{i}{}^{15}\mathrm{N}\{\; \}^\{14\}\; \backslash mathrm\{N\}\; ~\backslash mathrm\{i\}\; ~\{\; \}^\{15\}\; \backslash mathrm\{N\}$

${}^{32}\mathrm{S}\mathrm{i}{}^{33}{\mathrm{S}}^{2-}\{\; \}^\{32\}\; \backslash mathrm\{S\}\; ~\backslash mathrm\{i\}\; ~\{\}^\{33\}\; \backslash mathrm\{S\}^\{2-\}$

${}^{14}{\mathrm{N}}^{3-}\mathrm{i}{}^{16}{\mathrm{O}}^{2-}\{\; \}^\{14\}\; \backslash mathrm\{N\}^\{3-\}~\backslash mathrm\{i\}~\{\; \}^\{16\}\; \backslash mathrm\{O\}^\{2-\}$

${}^{80}\mathrm{S}\mathrm{e}\mathrm{i}{}^{80}\mathrm{B}\mathrm{r}\{\; \}^\{80\}\; \backslash mathrm\{Se\}\; ~\backslash mathrm\{i\}~\{\}^\{80\}\; \backslash mathrm\{Br\}$