Introduction to Resonance Part A Learning Goal: To understand what resonance mea

Question

Introduction to Resonance Part A Learning Goal: To understand what resonance means and when it occurs. Which choice represents a pair of resonance sructures? Note that lone pairs have been omitted for clarity Hints Three resonance structures can be drawn for NO, (see the igure) because it is possible to have the double bond on any of the three oxygen atoms. (Eigure 1) N=C-Br and Ci N-Br O O-N O and O N-O Here the total number of valence electrons in NOs is 24(5 valence electrons from nitrogen, 18 electrons from 3 oxygen atoms, and 1 electron from the single negative charge present in the molecule). All these resonance structures have 24 valence electrons Which one is correct? Experiments show that all three bonds in nitrate have the same length. This indicates that the electrons of the double bond have become delocalized, or spread out over all three oxygen atoms. Therefore, each oxygen atom forms one and one-third bonds. The actual structure is an average of all three resonance strucures, as shown in the second figure. Figure 2) Submit My Answers Give Up Part B How many resonance structures can be drawn for azone, O? Express your answer numerically as an integer Hints Submit My Answers Give Up Part C This question wil be shown after you complete previous question Figure 1 of 2

Explanation / Answer

part A)

A molecule can have resonance structures when it has a lone pair or a double bond on the atom next to a double bond.

clearly c option does not have another element to resonate their pie bond nor F has pie bond

option d in this H does not have a lone pair nor NC hace any other element to resonate with

option a they both can resonate but they are not the similar pair

option B which is correct because its pie bond is able to resonate with the lone pair of the adjacent atom.

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