Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single...
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![Page 1: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/1.jpg)
Unit 7 Review
Molecular Compounds
![Page 2: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/2.jpg)
1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____.
A. Ionic bondB. Covalent bondC. Coordinate covalent bondD. Metallic bond
![Page 3: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/3.jpg)
2. The shape of the methane molecule (CH4) is called ____.
A. linearB. Trigonal planarC. Trigonal pyramidalD. Tetrahedral
![Page 4: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/4.jpg)
3. Which elements can form diatomic molecules joined by a single covalent bond?
A. Hydrogen onlyB. Halogens onlyC. Hydrogen and halogensD. All diatomic molecules
![Page 5: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/5.jpg)
4. Experimental evidence suggests that the H-C-H bond angles in ethene, C2H4, are ____ degrees.
A. 180B. 120C. 109.5D. 107
![Page 6: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/6.jpg)
5. A bond that is not symmetrical along the axis between two atomic nuclei is a(n) ____ bond.
A. Covalent B. IonicC. sigmaD. pi
![Page 7: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/7.jpg)
6. How many electrons can occupy a single molecular orbital?
A. 1B. 2C. 4D. 6
![Page 8: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/8.jpg)
7. According to the VSEPR theory, molecules adjust their shapes to keep ____ as far apart as possible.
A. electronsB. protonsC. neutronsD. nuclei
![Page 9: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/9.jpg)
8. What is the shape of a molecule with the formula AB4?
A. Trigonal pyramidalB. tetrahedralC. bentD. Straight line
![Page 10: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/10.jpg)
9. A bond formed between a silicon atom and an oxygen atom is likely to be a(n) ____ bond.
A. Polar covalent B. Non-polar covalentC. Ionic bondD. Metallic bond
![Page 11: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/11.jpg)
10. Which of the following diatomic molecules is joined by a double covalent bond?
A. H2
B. Cl2
C. N2
D. O2
![Page 12: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/12.jpg)
11. Which of these elements does not exist as a diatomic molecule?
A. ArB. BrC. ID. Cl
![Page 13: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/13.jpg)
12. Which of the following covalent bonds is the most polar?
A. H-HB. H-OC. N-SD. H-F
![Page 14: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/14.jpg)
13. What is thought to cause the disperson forces?
A. The movement of protons.B. The movement of electrons.C. Electron transfer.D. The sharing of electrons.
![Page 15: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/15.jpg)
14. What are the weakest attractions between molecules called?
A. Dispersion forcesB. Londen dispersion forcesC. Van der Waals forcesD. All of the above
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15. Which of the following concerning carbon tetraiodide is correct?
A. Tetrahedral, 109.5, nonpolarB. Tetrahedral, 109.5, polarC. Trigonal pyramidal, 107, nonpolarD. Bent, 104.5, nonpolar
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16. What is the shape of a tri-atomic molecule with a triple bond?
A. Straight lineB. LinearC. BentD. Tirgonal planar
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17. Which of the forces of molecular attraction is the weakest?
A. Covalent bondB. Hydrogen bondC. Van der Waals forcesD. Dipole-dipole forces
![Page 19: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/19.jpg)
18. What is the name given to pairs of valence electrons that do not participate in bonding in diatomic oxygen molecules?
A. Bonding pairsB. Lone pairsC. Single bondD. Pi bond
![Page 20: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/20.jpg)
19. How many covalent bonds are in a covalently bonded molecule containing 1 phosphorus atom and 3 chlorine atoms?
A. 1B. 2C. 3D. 4
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20. What is the bond angle in a water molecule?
A. 120B. 109.5C. 107D. 104.5
![Page 22: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/22.jpg)
21. How many unshared pairs of electrons are in a molecule of hydroiodic acid?
A. 0B. 1C. 2D. 3
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22. How many sigma bonds are there in a molecule of carbon dioxide?
A. 1B. 2C. 3D. 4
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23. What is shape of a molecule of ammonia (NH3)?
A. bentB. Trigonal planarC. Trigonal pyramidalD. Tetrahedral
![Page 25: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/25.jpg)
24. Which of the following is correct concerning the number of sigma and pi bonds in N2?
A. 3 sigmaB. 1 sigma, 2 piC. 2 sigma, 1 piD. 3 pi
![Page 26: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/26.jpg)
25. What would the bond angle of phosphorus trichloride be?
A. 120B. 109.5C. 107D. 104.5
![Page 27: Unit 7 Review Molecular Compounds. 1. When one atom contributes both bonding electrons in a single covalent bond, the bond is called a(n) ____. A.Ionic.](https://reader036.fdocuments.us/reader036/viewer/2022062313/56649cbb5503460f9498321f/html5/thumbnails/27.jpg)
ANSWERS1. C 9. A 17. C2. D 10. D 18. B3. C 11. A 19. C4. B 12. D 20. D5. D 13. B 21. D6. B 14. D 22. B7. A 15. A 23. C8. B 16. B 24. B
25. C