Question

Ch 08 HW Introduction to Resonance Resources a previous | 7 of 8 Inext » Introduction to Resonance Part A Learning Goal Which choice represents a pair of resonance structures? Note that lone pairs have been omitted for clarity. To understand what resonance means and when it Hints Three resonance structures can be drawn for NO3 (see the figure) because it is possible to have the double bond on any of the three oxygen atoms. (Figure 1) H-O-H and H-O Here the total number of valence electrons in NO3 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. H-H and Br-Br O-N O and O N-O Submit My Answers Give Up 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 structures, as shown in the second figure. Part B How many resonance structures can be drawn for ozone, O3? Express your answer numerically as an integer Hints Submit My Answers Give Up Part C Figure 1 of 2 This question will be shown after you complete previous question(s) Continue

Answer 1