Which of the following species is paramagnetic?

Step-by-step solution

The magnetic nature of a species can be determined by its molecular orbital electronic configuration. For N ₂ (14 electrons): _ 1s ² ^ * _ 1s ² _ 2s ² ^ * _ 2s ² _ 2p_x ² = _ 2p_y ² _ 2p_z ² . All electrons are paired, so it is diamagnetic. For Li ₂ (6 electrons): _ 1s ² ^ * _ 1s ² _ 2s ² . All electrons are paired, so it is diamagnetic. For F ₂ (18 electrons): _ 1s ² ^ * _ 1s ² _ 2s ² ^ * _ 2s ² _ 2p_z ² _ 2p_x ² = _ 2p_y ² ^ * _ 2p_x ² = ^ * _ 2p_y ² . All electrons are paired, so it is diamagnetic. For N ₂⁺ (13