Kemija - 2009./10. jesen - 28.

A. ${}_5^{10}\mathrm{B}\{\; \}\_\{5\}^\{10\}\; \backslash mathrm\{~B\}$ i ${}_5^{11}\mathrm{B}\{\; \}\_\{5\}^\{11\}\; \backslash mathrm\{~B\}$

B. ${}_{31}^{69}\mathrm{G}\mathrm{a}\mathrm{i}{}_{32}^{74}\mathrm{G}\mathrm{e}\{\; \}\_\{31\}^\{69\}\; \backslash mathrm\{Ga\}\; \backslash mathrm\{~i~\}\{\; \}\_\{32\}^\{74\}\; \backslash mathrm\{Ge\}$

C. ${}_{33}^{69}\mathrm{A}\mathrm{s}\{\; \}\_\{33\}^\{69\}\; \backslash mathrm\{As\}$ i ${}_{33}^{74}\mathrm{A}\mathrm{s}\{\; \}\_\{33\}^\{74\}\; \backslash mathrm\{As\}$

D. ${}_{34}^{82}\mathrm{S}\mathrm{e}\mathrm{i}{}_{36}^{82}\mathrm{K}\mathrm{r}\{\; \}\_\{34\}^\{82\}\; \backslash mathrm\{Se\}\; \backslash mathrm\{~i~\}\{\; \}\_\{36\}^\{82\}\; \backslash mathrm\{Kr\}$