Which of the following is NOT a valid pair of resonance structures? [36] •[0-8] A) C) [ s • [0-9] D)

1. Draw Lewis structures for each of the following molecules, showing all covalent bonds, formal charges, and lone pairs. a) NO₂ b) BrCN c) (CH3)2CO d) CH3CO₂

Draw a resonance structure that is NOT a proper resonance structure of the following ion?

[Review Topics] [References] Unshared, or lone, electron pairs play an important role in determining the chemical and physical properties of organic compounds. Thus, it is important to know which atoms carry unshared pairs. Use the structural formulas below to determine the number of unshared pairs at each designated atom. Be sure your answers are consistent with the formal charges on the formulas. H3C -C=N=O a H₂C-C=N a b C Submit Answer C The number of unshared pairs at atom a is The number of unshared pairs at atom b is The number of unshared pairs at atom c is The number of unshared pairs at atom a is The number of unshared pairs at atom b is The number of unshared pairs at atom c is Retry Entire Group 1 more group attempt remaining V

Draw the Lewis structure of the missing product. Make sure to include lone pairs and non-zero formal charges.

Which of the following are not related as resonance structures? OH (A) `NH. NH (B) ОН (C) CH2 (D)

CHEM 1P92 Assignment 12B (Liquids, Solids, and Intermolecular Forces). Version # 177 1. Draw Lewis structures for the following compounds. Remember to enclose ions in square brackets. On your answer sheet, state the number of valence electrons in each compound. (a) CH 3 I (b) CaCl 2 (c) Mg(NO3)2