The number of molecules/ions that show linear geometry among the following is ____. SO_2, BeCl_2, CO_2, N_3^-, NO_2, F_2 O, XeF_2, NO_2^+, I_3^-, O_3

The number of molecules/ions that show linear geometry among the following is $\displaystyle \_\_\_\_$. $$\mathrm{SO}_2, \mathrm{BeCl}_2, \mathrm{CO}_2, \mathrm{~N}_3^{-}, \mathrm{NO}_2, \mathrm{~F}_2 \mathrm{O}, \mathrm{XeF}_2, \mathrm{NO}_2^{+}, \mathrm{I}_3^{-}, \mathrm{O}_3 $$