Question

Which of these molecules and polyatomic ions cannot be adequately described using a single Lewis structure?  Check...

Which of these molecules and polyatomic ions cannot be adequately described using a single Lewis structure?  Check all that apply.

CO3 2-

COH2

HCN

O3

NH4+

OF2

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Answer #1
Concepts and reason

The problem is based on the concept of Lewis structure and resonating structure.

Lewis structure is the electron dot structure and represents the electron distribution in the atom. Resonance structure is the Lewis structure that differs only in the electrons placement. Resonance structures are the energetically identical structure.

Fundamentals

The electron distribution in the atom is represented by Lewis structure. The delocalization of the electrons in the compound is described by the resonating structure. Resonance describes the structure of those molecules which cannot be represented by the single Lewis structure.

The structure of COH2{\rm{CO}}{{\rm{H}}_2} is as follows:

OSO:

The structure of COH2{\rm{CO}}{{\rm{H}}_2} is represented by single Lewis structure.

The structure of HCN{\rm{HCN}} is as follows:

:N=—H

The structure of HCN{\rm{HCN}} is represented by single Lewis structure.

The structure of NH4+{\rm{NH}}_4^ + is as follows:

Η
Η

The structure of NH4+{\rm{NH}}_4^ + is represented by single Lewis structure.

The structure of OF2{\rm{O}}{{\rm{F}}_2} is as follows:

F—7—F

The structure of OF2{\rm{O}}{{\rm{F}}_2} is represented by single Lewis structure.

Draw the resonating structure of carbonate ion (CO32)\left( {{\rm{CO}}_3^{2 - }} \right) as follows:

༧
S:

The resonating structure of ozone (O3)\left( {{{\rm{O}}_3}} \right) is as follows:

Ans:

The structure of CO32{\rm{CO}}_3^{2 - } cannot be described by the single Lewis structure.

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