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  4. The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number 16 is

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Q. The number of unpaired electrons in a paramagnetic diatomic molecule of an element with atomic number $16$ is

AIIMSAIIMS 2013

Solution:

Like $O _{2}$ molecule, sulphur (atomic number $=16$ ) exists as $S _{2}$ molecule in vapour state and it is paramagnetic due to the presence of two unpaired electrons in antibonding $\pi$ molecular orbitals.