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| 1 | |
Of the three major types of bonding (ionic, covalent, metallic) which ones are based on electrostatic attractions between opposite charges? |
| | A) | only ionic bonding |
| | B) | only ionic and covalent bonding |
| | C) | only ionic and metallic bonding |
| | D) | ionic, covalent and metallic bonding |
| | E) | none of the above |
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| 2 | |
The Lewis dot symbol for the oxide ion is |
| | A) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073402699/37547/Image8.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | B) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073402699/37547/Image9.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | C) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073402699/37547/Image10.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | D) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073402699/37547/Image11.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| | E) |  <![CDATA[<a onClick="window.open('/olcweb/cgi/pluginpop.cgi?it=gif::::/sites/dl/free/0073402699/37547/Image12.gif','popWin', 'width=NaN,height=NaN,resizable,scrollbars');" href="#"><img valign="absmiddle" height="16" width="16" border="0" src="/olcweb/styles/shared/linkicons/image.gif"> (0.0K)</a>]]> |
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| 3 | |
Which of the following is the correct formula for magnesium nitride? |
| | A) | Mg NO3 |
| | B) | Mg(NO3)2 |
| | C) | MgN |
| | D) | Mg2N3 |
| | E) | Mg3N2 |
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| 4 | |
The electrostatic force of attraction between two charges, A and B, is proportional to |
| | A) | (charge A) + (charge B) + (distance between the charges)2 |
| | B) | (charge A) x (charge B) x (distance between the charges)2 |
| | C) | (charge A) x (charge B) + (distance between the charges)2 |
| | D) | (charge A) x (charge B) / (distance between the charges)2 |
| | E) | (distance between the charges)2/(charge A) x (charge B) |
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| 5 | |
Predict which of the following solids has the greatest lattice energy. |
| | A) | CsI |
| | B) | NaF |
| | C) | SrCl2 |
| | D) | KF |
| | E) | SrO |
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| 6 | |
Ionic compounds normally conduct electricity |
| | A) | when in the solid state. |
| | B) | only when molten. |
| | C) | when in aqueous solution or molten. |
| | D) | only when in aqueous solution. |
| | E) | when a solid or in aqueous solution. |
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| 7 | |
Order the following by decreasing bond length: C≡C, C=C, C-C |
| | A) | they are all the same |
| | B) | C≡C, C=C, C-C |
| | C) | C≡C, C-C, C=C |
| | D) | C-C, C=C, C≡C |
| | E) | C=C, C-C, C≡C |
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| 8 | |
List the following bonds in order of decreasing strength: Br-Br, Cl-Cl, F-F, I-I. |
| | A) | F-F, Cl-Cl, I-I, Br-Br |
| | B) | F-F, Br-Br, Cl-Cl, I-I |
| | C) | I-I, Br-Br, Cl-Cl, F-F |
| | D) | F-F, Cl-Cl, Br-Br, I-I |
| | E) | I-I, Cl-Cl, Br-Br, F-F |
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| 9 | |
Which one of the following is not characteristic of substances composed of small, covalently-bonded molecules? |
| | A) | low melting point |
| | B) | low boiling point |
| | C) | weak bonds |
| | D) | poor electrical conductor when solid |
| | E) | poor electrical conductor when molten |
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| 10 | |
Electronegativity is a measure of |
| | A) | the energy needed to remove an electron from an atom. |
| | B) | the energy released when an electron is added to an atom. |
| | C) | the magnitude of the negative charge on an electron. |
| | D) | the attraction by an atom for electrons in a chemical bond. |
| | E) | the magnitude of the negative charge on a molecule. |
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| 11 | |
Which of the following elements is the most electronegative? |
| | A) | C |
| | B) | Si |
| | C) | As |
| | D) | Cl |
| | E) | Sr |
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| 12 | |
Consider an isolated H-C bond in an organic compound. Based on the electronegativities of the two elements, which of the following best describes the net charge on the carbon atom? |
| | A) | no polarization of the bond, i.e. no net charge |
| | B) | a full negative charge |
| | C) | a full positive charge |
| | D) | a partial negative charge |
| | E) | a partial positive charge |
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| 13 | |
Which of the following lists orders the bonds from the most to the least covalent character? |
| | A) | H-C, N-H, H-O |
| | B) | H-C, H-O, N-H |
| | C) | H-O, N-H, H-C |
| | D) | N-H, H-O, H-C |
| | E) | N-H, H-C, H-O |
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| 14 | |
Based on electronegativity trends in the periodic table, predict which of the following compounds will have the greatest % ionic character in its bonds. |
| | A) | HCl |
| | B) | CaI2 |
| | C) | CaCl2 |
| | D) | SrF2 |
| | E) | SrCl2 |
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| 15 | |
Which one of the following properties is not characteristic of typical metals? |
| | A) | moderately high melting point |
| | B) | high boiling point |
| | C) | brittleness |
| | D) | good electrical conductor when solid |
| | E) | good electrical conductor when molten |
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