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Chemistry Question on Chemical bonding and molecular structure

Decreasing order of stability of O2,O2−,O2+O_2, O^-_2, O_2^+ and O22−{ O_2^{2-}} is :

A

O2>O2+>O22−>O2−{O_2 > O_2^+ > O_2^{2-} > O_2^- }

B

O2−>O22−>O2+>O2O^-_2 > O_2^{2-} > O_2^{+} > O_2

C

O2+>O2>O2−>O22−{O_2^+ > O_2 > O_2^- > O_2^{2-} }

D

O22−>O2−>O2>O2+{O_2^{2-} > O_2^- > O_2 > O_2^+ }

Answer

O2+>O2>O2−>O22−{O_2^+ > O_2 > O_2^- > O_2^{2-} }

Explanation

Solution

Given species : O2,O2−1,O2+1,O22−{O_2, O_2{^{-1}} , O_2{^{+1}} , O_2{^{2-}}}
Total number of electrons
O2−>16e−{O_2 -> 16e^{-}}
O2−1−>17e−{O_{2}^{-1} -> 17e^{-}}
O2+1−>15e−{O_2^{+1} -> 15e^{-}}
O22−−>18e−{O_{2}^{2-} -> 18 e^{-}}