Kemija - 2015./16. ljeto - 5.

A. ${}_{18}^{40}\mathrm{A}\mathrm{r}\{\; \}\_\{18\}^\{40\}\; \backslash mathrm\{Ar\}$

B. ${}_8^{18}\mathrm{O}\{\; \}\_\{8\}^\{18\}\; \backslash mathrm\{O\}$

C. ${}_{19}^{40}\mathrm{K}\{\; \}\_\{19\}^\{40\}\; \backslash mathrm\{~K\}$

D. ${}_{22}^{48}\mathrm{T}\mathrm{i}\{\; \}\_\{22\}^\{48\}\; \backslash mathrm\{Ti\}$