Using electrons and/or lone pairs in the following conjugated system, create a resonance form by moving electrons as far as possible. Modify the structure to show the resonance structure resulting from the movement of electrons. Be sure to include all lone pairs of electrons and charges. 0: & G P

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Using electrons and/or lone pairs in the following conjugated system, create a resonance form by moving electrons as far as possible. Modify the structure to show the resonance structure resulting from the movement of electrons. Be sure to include all lone pairs of electrons and charges. + + 0: ☑ ☐ :

11. Which of the following statements about resonance is true? I. Resonance hybrids occur because a compound changes back and forth between two or more resonance structures. II. Resonance structures differ in the arrangement of electrons but not in the arrangement of atoms. III. Resonance hybrids contain delocalized electrons. IV. Resonance structures for a given compound always contribute equally to the resonance hybrid. V. Resonance structures occur when there are two or more valid Lewis structures for a given compound. VI. Resonance hybrids are a composite of resonance structures. a. I, II, V, VI b. I, II, V, VI c. II, III, IV, VI d. II, III, V, VI e. II, IV, V, VI 12. How many resonance forms will nitrate ion (NO3-) have? a. -1 b. 0 c. 1 d. 2 e. 3 13. A list of non-metals is given below. Which elements cannot exceed the octet rule? B Si N P O S F Cl a. Si, P, S, Cl b. B, N, O, F c. O, S, F, Cl d. B, Si, N, P e. All eight elements can exceed the octet…

The structure of a vitamin is shown below. H HH H. нн C C-H нн н о H a) Write the line structure for this vitamin adding all the lone pairs to your structure b) Identify the functional groups in the vitamin c) Identify three polar covalent bonds (involving different pairs of elements) in the structure and draw the partial charges on the atoms involved. d) Identify two potentially nucleophilic atoms and two potentially electrophilic atoms in your structure, giving a very brief explanation in each case. 2.

Which statement is true regarding the pairs of molecules in a and b, below? а) and b) and .C. H3C CH3 H3C° CH3 H3C `CH3 H3C CH2 O Neither pair represent resonance forms O Pair a represents resonance structures, pair b does not O Pair b represents resonance structures, pair a does not Both pairs represent resonance forms

please explain also

Two major contributing resonance structures are possible for the anion shown. One is given, but is incomplete. Complete the given structure by adding non-bonding electrons and formal charges. Draw the remaining structure, including non-bonding electrons and formal charges. Omit curved arrows. Draw formal charges and lone pairs to structure 1. H H H I. с | H H Complete structure 2. Add the pi bond, lone pairs and charges. H H H 1. A | 1 H H H

The curved arrow notation is a powerful method used by organic chemists to show the movement of electrons not only in resonance structures, but also in chemical reactions. Since each curved arrow shows the movement of two electrons, following the curved arrows illustrates what bonds are broken and formed in a reaction. Consider the following reaction. Choose the correct image that shows the curved arrows to show the movement of electrons.

1. For each of the following compounds and ions, draw the complete Lewis structure. All formal charges should be on the atoms that possess that formal charge. CH4 H3CBr CH3CH₂OH H₂S H₂SO4 (sulfuric acid) H³0+ CH3* 2. Convert the following condensed formulas into bond-line structures, making sure to draw in zig-zag formation. CH3CH₂CH₂CH₂CH₂CH₂CH₂CH3 FCH₂CH₂I H₂C=CHCH₂OH (CH3)2CHCOOH