Which of the following species has lowest ionization potential [KCET 1

1.	Which of the following species has lowest ionization potential [KCET 1996]
A.	\[O\]
B.	\[{{O}_{2}}\]
C.	\[O_{2}^{+}\]
D.	\[O_{2}^{-}\]
Answer» E.

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Which of the following species has lowest ionization potential [KCET 1996]

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