QQuestionChemistry
QuestionChemistry
| No. | formula | Total valence count | Lewis structure including all resonance | Electron Geometry (EG) classification | 3 -D Structure (Draw B', B' on polar bonds) | Molecular Shape (MS) classification | Bond angle(s) | Molecular polarity and net dipole symbol |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 6 | 30Cl | 26 | :0: 5: 0: 5: 0: | trigonal Pyramidal | 0 11 5 0 0 0 | 104.5 | 104.5 | |
| 7 | 30s² | 26 | :0: 5: 0: 5: 0: | trigonal Pyramidal | :0: 5: 0: 0: 0 | 104.5 | 104.5 | |
| 8 | NO₃⁻⁷ | 24 | 0 1 0: 0: 0: 0: | trigonal Pyramidal | 0 1 0: 0: 0: 0 | 120° | 120° | |
| 9 | 30L | 20 | :0: - 5: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0: - 0
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Answer
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Step 1:**Problem:** Given the information in the table, determine the molecular shape and bond angle(s) for each molecule or ion.
Step 2:** 6: 30Cl** - Total valence count is 26.
The Lewis structure including all resonance is:Cl :0: Cl :5: Cl :0: Cl :5: 0:. The electron geometry classification is trigonal pyramidal, and there are no lone pairs on the central atom. The 3 -D structure is drawn with B' on polar bonds. The molecular shape classification is also trigonal pyramidal, and the bond angle is approximately 104.5 degrees. Since there is a positive charge on the central atom, the molecule is polar. **Molecular Shape:** Trigonal Pyramidal **Bond Angle:** ~104.5 degrees **Molecular Polarity:** Polar (Cl has a positive partial charge)
Step 3:** 7: 30s²** - Total valence count is 26.
The Lewis structure including all resonance is:S :0: :5: S :0: 0:. The electron geometry classification is trigonal pyramidal, and there are no lone pairs on the central atom. The 3 -D structure is drawn with B' on polar bonds. The molecular shape classification is also trigonal pyramidal, and the bond angle is approximately 104.5 degrees. Since there is a negative charge on the central atom, the molecule is polar. **Molecular Shape:** Trigonal Pyramidal **Bond Angle:** ~104.5 degrees **Molecular Polarity:** Polar (S has a negative partial charge)
Step 4:** 8: NO₃⁻⁷** - Total valence count is 24.
The Lewis structure including all resonance is: N :0: :1: O :0: :0:. The electron geometry classification is trigonal pyramidal, and there is one lone pair on the central atom. The 3 -D structure is drawn with B' on polar bonds. The molecular shape classification is also trigonal pyramidal, and the bond angle is approximately 120 degrees. Since the negative charge is distributed evenly among the oxygen atoms, the molecule is nonpolar. **Molecular Shape:** Trigonal Pyramidal **Bond Angle:** ~120 degrees **Molecular Polarity:** Nonpolar (the negative charge is distributed evenly among the oxygen atoms)
Step 5:** 9: 30L** - Total valence count is 20.
The Lewis structure including all resonance is:L :0: :- 5:. The electron geometry classification is linear, and there are no lone pairs on the central atom. The 3 -D structure is drawn with B' on polar bonds. The molecular shape classification is also linear, and the bond angle is 180 degrees. Since there is a negative charge on the central atom, the molecule is polar. **Molecular Shape:** Linear **Bond Angle:** 180 degrees **Molecular Polarity:** Polar (L has a negative partial charge) **
Final Answer
1. ** 6: 30Cl:** Molecular Shape: Trigonal Pyramidal, Bond Angle: ~104.5 degrees, Molecular Polarity: Polar (Cl has a positive partial charge) 2. ** 7: 30s²:** Molecular Shape: Trigonal Pyramidal, Bond Angle: ~104.5 degrees, Molecular Polarity: Polar (S has a negative partial charge) 3. ** 8: NO₃⁻⁷:** Molecular Shape: Trigonal Pyramidal, Bond Angle: ~120 degrees, Molecular Polarity: Nonpolar (the negative charge is distributed evenly among the oxygen atoms) 4. ** 9: 30L:** Molecular Shape: Linear, Bond Angle: 180 degrees, Molecular Polarity: Polar (L has a negative partial charge)
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