2. Write a Lewis Structure that obeys the octet rule for each of the following molecule and ions. In each case, the first atom listed is the central atom. a) POCI 3, SO42, XeO4, PO4³-, CIO4 b) NF3, SO32, PO3 ³-, CIO3- c) CIO₂, SCI2, PC1₂ 3. Considering your answers to # 2, what conclusions can you draw concerning the structures of species that have the same number of atoms and the same number of valence electrons? HEMY

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### Lewis Structures and Molecular Shapes

1. **Draw Lewis Structures that obey the octet rule for each of the following:**
   - **a. HCN**
   - **b. PH₃**
   - **c. CHCl₃**
   - **d. NH₄⁺**
   - **e. BF₄⁻**
   - **f. SeF₂**

2. **Write a Lewis Structure that obeys the octet rule for each of the following molecules and ions. In each case, the first atom listed is the central atom.**
   - **a. POCl₃, SO₄²⁻, XeO₄, PO₄³⁻, ClO₄⁻**
   - **b. NF₃, SO₃²⁻, PO₃³⁻, ClO₃⁻**
   - **c. ClO₂, SCl₂, PCl₂**

3. **Considering your answers to #2, what conclusions can you draw concerning the structures of species that have the same number of atoms and the same number of valence electrons?**

4. **Benzene (C₆H₆) consists of a six-membered ring of carbon atoms with one hydrogen bonded to each carbon. Write Lewis structures for the two resonance structures of benzene.**

5. **What are the shapes of:**
   - **a. I₃⁻, ClF₃, IF₄⁺, SF₅⁻**
   - **b. SeO₃²⁻, SeH₂, SeO₄²⁻**
   - **c. BrF₅, KrF₄, IF₆⁺**

---

### Explanation of Diagrams

- **Lewis Structures**: Visual representations where dots around atoms indicate valence electrons. Bonds between atoms are shown as lines. Some structures include formal charges to reflect actual electron distribution more accurately.

- **Resonance Structures of Benzene**: Two diagrams illustrate alternating double and single bonds in a hexagonal carbon ring bonded to hydrogen, reflecting pi electron delocalization.

Understanding these concepts assists in predicting molecular geometry, bond angles, and chemical reactivity based on electron arrangement.
Transcribed Image Text:### Lewis Structures and Molecular Shapes 1. **Draw Lewis Structures that obey the octet rule for each of the following:** - **a. HCN** - **b. PH₃** - **c. CHCl₃** - **d. NH₄⁺** - **e. BF₄⁻** - **f. SeF₂** 2. **Write a Lewis Structure that obeys the octet rule for each of the following molecules and ions. In each case, the first atom listed is the central atom.** - **a. POCl₃, SO₄²⁻, XeO₄, PO₄³⁻, ClO₄⁻** - **b. NF₃, SO₃²⁻, PO₃³⁻, ClO₃⁻** - **c. ClO₂, SCl₂, PCl₂** 3. **Considering your answers to #2, what conclusions can you draw concerning the structures of species that have the same number of atoms and the same number of valence electrons?** 4. **Benzene (C₆H₆) consists of a six-membered ring of carbon atoms with one hydrogen bonded to each carbon. Write Lewis structures for the two resonance structures of benzene.** 5. **What are the shapes of:** - **a. I₃⁻, ClF₃, IF₄⁺, SF₅⁻** - **b. SeO₃²⁻, SeH₂, SeO₄²⁻** - **c. BrF₅, KrF₄, IF₆⁺** --- ### Explanation of Diagrams - **Lewis Structures**: Visual representations where dots around atoms indicate valence electrons. Bonds between atoms are shown as lines. Some structures include formal charges to reflect actual electron distribution more accurately. - **Resonance Structures of Benzene**: Two diagrams illustrate alternating double and single bonds in a hexagonal carbon ring bonded to hydrogen, reflecting pi electron delocalization. Understanding these concepts assists in predicting molecular geometry, bond angles, and chemical reactivity based on electron arrangement.
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