Download Unit 3 Review Questions - Unit #1-0

Unit 3 Review Questions: Bonding
Multiple-choice exercise
1. Chemical bonds may be produced by any of the following processes involving
electrons EXCEPT:
1. ? splitting electrons
2. ? losing electrons
3. ? gaining electrons
4. ? sharing electrons
5.
2. In ionic bonds, valence electrons are:
1. ? unequally shared
2. ? transferred
3. ? equally shared
4. ? destroyed
5.
3. In nonpolar covalent bonds, valence electrons are:
1. ? destroyed
2. ? transferred
3. ? equally shared
4. ? unequally shared
5.
4. In polar covalent bonds, valence electrons are:
1. ? equally shared
2. ? unequally shared
3. ? transferred
4. ? destroyed
5.
5. In metallic bonding, the valence electrons of all atoms are shared in:
1. ? a nonpolar covalent bond
2. ? an electron sea
3. ? transferred to nonmetallic ions
4. ? a polar covalent bond
5.
6. Bonds between atoms of metals are generally:
1. ? Covalent
2. ? Metallic
3. ? Ionic
4.
7. Bonds between nonmetals and other nonmetals are generally:
1. ? Covalent
2. ? Metallic
3. ? Ionic
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8. Bonds between metals and nonmetals are generally:
1. ? Ionic
2. ? Metallic
3. ? Covalent
4.
9. A bond between nitrogen (atomic #7) and oxygen (atomic #8) would be:
1. ? metallic
2. ? ionic
3. ? covalent
4.
10. The bond between boron (atomic #5) and silicon (atomic #14) is:
1. ? ionic
2. ? covalent
3. ? metallic
4.
11. The bond in between sodium (atomic #11) and oxygen (atomic #8) is:
1. ? ionic
2. ? metallic
3. ? covalent
4.
12. The bond between hydrogen (atomic #1) and oxygen (atomic #8) is:
1. ? ionic
2. ? covalent
3. ? metallic
4.
13. The bond between lithium (atomic #3) and fluorine (atomic #9) is:
1. ? ionic
2. ? metallic
3. ? covalent
4.
14. A bond between potassium (atomic #19) and chlorine (atomic #17) would be:
1. ? ionic
2. ? covalent
3. ? metallic
4.
15. The bond in between an oxygen atom and another oxygen atom is:
1. ? metallic
2. ? ionic
3. ? covalent
4.
16. The bond existing between the atoms of iron (atomic #26) in a piece of iron is:
1. ? ionic
2. ? metallic
3. ? covalent
2
4.
17. The correct electron-dot notation for the element indium (atomic #49) is:
1.
?
2.
?
3.
?
4. ?
5.
18. How many valence electrons are in atom of sulfur (atomic #16) ?
1. ? six
2. ? seven
3. ? two
4. ? five
5. ? four
6. ? eight
7. ? one
8. ? three
9.
19. How many valence electrons are in atom of radon (atomic #86) ?
1. ? two
2. ? seven
3. ? one
4. ? six
5. ? eight
6. ? three
7. ? four
8. ? five
9.
20. How many valence electrons are in atom of cesium (atomic #55)?
1. ? two
2. ? six
3. ? four
4. ? one
5. ? seven
6. ? five
7. ? three
8. ? eight
9.
21. How many valence electrons are in atom of carbon (atomic #6) ?
1. ? six
2. ? seven
3. ? two
4. ? eight
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5. ? five
6. ? three
7. ? one
8. ? four
9.
22. How many valence electrons are in atom of aluminum (atomic #13)?
1. ? six
2. ? five
3. ? three
4. ? two
5. ? eight
6. ? one
7. ? four
8. ? seven
9.
23. How many valence electrons are in atom of arsenic (atomic #33)?
1. ? three
2. ? two
3. ? four
4. ? seven
5. ? eight
6. ? six
7. ? five
8. ? one
9.
24. Which of the following IS NOT a covalent compound?
1. ? CO2
2. ? NH3
3. ? CaO
4. ? CH3Cl
5.
25. Which of the following IS NOT an ionic compound?
1. ? Mg3N2
2. ? C2H5OH
3. ? MnO2
4. ? KCl
5.
26. The octet rule explains the stability of most covalently bonded molecules in terms
of:
1. ? electronegativity differences
2. ? electron affinities
3. ? ionization energies
4. ? noble-gas configurations
5.
27. According to the HONC Rule, how many covalent bonds form around hydrogen
and the halogens?
4
1. ? two
2. ? four
3. ? one
4. ? three
5.
28. According to the HONC Rule, how many covalent bonds form around nitrogen?
1. ? one
2. ? two
3. ? three
4. ? four
5.
29. Which of the following is an acceptable Lewis Structure for the diatomic nitrogen
molecule?
1.
?
2.
?
3.
?
4. ?
5.
30. In the correct Lewis structure for the methane (CH4) molecule, how many
unshared electron pairs surround the carbon?
1. ? 0
2. ? 4
3. ? 2
4. ? 8
5.
31. In the correct Lewis structure for water, how many unshared pairs of electrons
will oxygen have?
1. ? 3
2. ? 4
3. ? 1
4. ? 2
5.
32. Which of the following is an acceptable Lewis structure for chloromethane
(CH3Cl)?
1.
?
5
2.
?
3.
?
4. ?
5.
33. When compared to single bonds, double bonds are generally:
1. ? longer and stronger
2. ? shorter and weaker
3. ? longer and weaker
4. ? shorter and stronger
5.
34. Which of the diatomic elements has a double bond between its atoms?
1. ? nitrogen
2. ? flourine
3. ? oxygen
4. ? hydrogen
5.
35. The seven elements that occur as diatomic elements are:
1. ? H2, N2, O2, F2, Cl2, Br2, I2
2. ? H2, N2, O2, He2, Ne2, Cl2, Br2
3. ? H2, N2, O2, He2, Ne2, C2, Na2
4. ? Fe2, Rn2, O2, He2, Ne2, C2, Br2
5.
36. In a diatomic molecule of an element, the bond between the atoms must be:
1. ? metallic
2. ? polar covalent
3. ? nonpolar covalent
4. ? ionic
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37. In the ionic compound magnesium fluoride, what is the ratio of the two elements
necessary so that each element obtains its octet from the transfer of electrons?
1. ? 1 magnesium : 1 fluorine
2. ? 1 magnesium : 2 fluorine
3. ? 2 magnesium : 1 fluorine
4. ? 3 magnesium : 1 fluorine
5.
38. How many sodium atoms are needed to provide the electrons necessary to
complete the valence octet of an oxygen atom?
1. ? four sodium atoms
2. ? one sodium atom
3. ? two sodium atoms
4. ? three sodium atoms
5.
39. In the sodium chloride crystal lattice, each positively charged ion is surrounded
by how many ions of opposite charge?
1. ? 8
2. ? 6
3. ? 2
4. ? 4
5.
40. Ionic compounds generally form:
1. ? gases
2. ? liquids
3. ? crystals
4. ? molecules
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