If the magnetic moment of a dioxygen species is 1.73 B.M, it may be

Step-by-step solution

Magnetic moment = 1.73 BM μ = n ( n + 2 ) 1.73 = n ( n + 2 ) On solving n = 1 Unpaired electron (n) = 1 O 2 + = σ 1 s 2 , σ * 1 s 2 , σ 2 s 2 , σ * 2 s 2 , σ 2 p 2 2 , π 2 p x 2 = π 2 p y 2 , π * 2 p x 1 = π * 2 p y O 2 - = σ 1 s 2 , σ * 1 s 2 , σ 2 s 2 , σ * 2 s 2 , σ 2 p 2 2 , π 2 p x 2 = π 2 p y 2 , π * 2 p x 2 = π * 2 p y 1 Hence O 2 - and O 2 + have one unpaired electron.