The pairs among A = [SO_3^{2-}, CO_3^{2-}], B | vedclass

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(B) To determine if the species have similar Lewis dot structures, we analyze their valence electrons and geometry:$A: SO_3^{2-}$ has $26$ valence ele

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$A$ and $E$

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(B) To determine if the species have similar Lewis dot structures, we analyze their valence electrons and geometry:$A: SO_3^{2-}$ has $26$ valence electrons and a trigonal pyramidal geometry. $CO_3^{2-}$ has $24$ valence electrons and a trigonal planar geometry. These are not similar.$B: O_2^{2-}$ has $14$ valence electrons $(:O-O:)$ and $F_2$ has $14$ valence electrons $(:F-F:)$. These are isoelectronic and have similar structures.$C: CN^-$ has $10$ valence electrons $([:C \equiv N:]^-)$ and $CO$ has $10$ valence electrons $(:C \equiv O:)$. These are isoelectronic and have similar structures.$D: NH_3$ has $8$ valence electrons and a trigonal pyramidal geometry. $H_3O^+$ has $8$ valence electrons and a trigonal pyramidal geometry. These are similar.$E: MnO_4^{2-}$ and $CrO_4^{2-}$ are both $d^0$ transition metal oxoanions with a tetrahedral geometry. These are similar.Therefore, only pair $A$ does not have similar structures.

The pairs among $A = [SO_3^{2-}, CO_3^{2-}]$, $B = [O_2^{2-}, F_2]$, $C = [CN^-, CO]$, $D = [NH_3, H_3O^+]$ and $E = [MnO_4^{2-}, CrO_4^{2-}]$ that do not have similar Lewis dot structures are:

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