Kemija - 2023. jesen, 12.

${}^{14}\mathrm{C}\{\; \}^\{14\}\; \backslash mathrm\{C\}$ i ${}^{13}\mathrm{C}\{\; \}^\{13\}\; \backslash mathrm\{C\}$

${}^{14}\mathrm{C}\{\; \}^\{14\}\; \backslash mathrm\{C\}$ i ${}^{14}\mathrm{N}\{\; \}^\{14\}\; \backslash mathrm\{N\}$

${}^{16}\mathrm{O}\{\; \}^\{16\}\; \backslash mathrm\{O\}$ i ${}^{32}\mathrm{S}^\{32\}\; \backslash mathrm\{S\}$

${}^{18}\mathrm{O}\{\; \}^\{18\}\; \backslash mathrm\{O\}$ i ${}^{19}\mathrm{F}\{\; \}^\{19\}\; \backslash mathrm\{F\}$