CHEM_REMOVED - CHEMICAL BONDING Question with Solution | TestHub

The total number of species from the following in which one unpaired electron is present, is _______ ${\mathrm{N}}_2,{\mathrm{O}}_2,{\mathrm{C}}_2^{-},{\mathrm{O}}_2^{-},{\mathrm{O}}_2^{2-},{\mathrm{H}}_2^{+},{\mathrm{CN}}^{-},{\mathrm{He}}_2^{+}$