Which of the following molecular species has unpaired electrons:

CHEMISTRY · Single correct · CBSE · Chemistry · Chemical Bonding and Molecular Structure · Chemical Bonding and Molecular Structure

Problem

Which of the following molecular species has unpaired electrons: (1)

\text{N}_2

(2)

\text{F}_2

(3)

\text{O}_2^-

(4)

\text{O}_2^{2-}