Species	Electronic configuration/structure	Magnetic nature
$O_{2}$	$σ 1 s^{2}, σ^{} 1 s^{2}, σ 2 s^{2}, σ^{} 2 s^{2}, σ 2 p_{z}^{2}, π 2 p_{x}^{2}, π 2 p_{y}^{2}, π^{} 2 p_{x}^{1}, π^{} 2 p_{y}^{1}$	Paramagnetic
$O_{2}^{+}$	$σ 1 s^{2}, σ^{} 1 s^{2}, σ 2 s^{2}, σ^{} 2 s^{2}, σ 2 p_{z}^{2}, π 2 p_{x}^{2}, π 2 p_{y}^{2}, π^{*} 2 p_{x}^{1}$	Paramagnetic
$O_{2}^{-}$	$σ 1 s^{2}, σ^{} 1 s^{2}, σ 2 s^{2}, σ^{} 2 s^{2}, σ 2 p_{z}^{2}, π 2 p_{x}^{2}, π 2 p_{y}^{2}, π^{} 2 p_{x}^{2}, π^{} 2 p_{y}^{1}$	Paramagnetic
$NO$	$σ 1 s^{2}, σ^{} 1 s^{2}, σ 2 s^{2}, σ^{} 2 s^{2}, σ 2 p_{z}^{2}, π 2 p_{x}^{2}, π 2 p_{y}^{2}, π^{*} 2 p_{x}^{1}$	Paramagnetic
${NO}_{2}$		Paramagnetic
$CO$	$σ 1 s^{2}, σ^{} 1 s^{2}, σ 2 s^{2}, π 2 p_{x}^{2}, π 2 p_{y}^{2}, σ 2 p_{z}, σ^{} 2 s^{2}$	Diamagnetic
$K_{2} [{NiCl}_{4}]$		Paramagnetic
$[Co {({NH}_{3})}_{6}] {Cl}_{3}$		Diamagnetic
$K_{2} [Ni {(CN)}_{4}]$		Diamagnetic

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