Chapter 6 Online – Flashcards
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Of the following elements, which has the highest electronegativity?
A. Si
B. Ca
C. Ge
D. P
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D. P
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Of the following elements, which has the lowest electronegativity?
A. At
B. I
C. Ba
D. Sr
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C. Ba
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The electronegativity is 2.1 for H and 1.8 for Ge. Based on these electronegativities GeH 4 would be expected to
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Have nonpolar bonds
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Identify the compound with the largest dipole moment in the gas phase.
A. HF
B. LiF
C. Cl₂
D. ClF
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B. LiF
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Choose the bond below that is most polar.
A. C₋H
B. H₋I
C. H₋Cl
D. H₋Br
E. H₋F
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E. H₋F
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Choose the bond below that is most polar.
A. C₋O
B. C₋N
C. C₋F
D. C₋C
E. F₋F
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C. C₋F
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A single covalent bond contains ________ of electrons.
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1 Pair
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A double covalent bond contains ________ of electrons.
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2 Pairs
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A triple covalent bond contains ________ of electrons.
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3 Pairs
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Give the number of valence electrons for CH₂Cl₂.
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20
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Give the number of valence electrons for ICl₅.
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42
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Identify the number of bonding pairs and lone pairs of electrons in Br₂.
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1 bonding pair and 6 lone pairs
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How many lone pairs of electrons are on the As atom in AsCl₃?
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1
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Identify the compound with atoms that have an incomplete octet.
A. CO₂
B. ICl₅
C. Cl₂
D. BF₃
E. CO
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D. BF₃
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Which of the following elements can form compounds with an expanded octet?
A. Be
B. I
C. F
D. N
E. None of the above can form compounds with an expanded octet.
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B. I
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Identify the shortest bond.
A. single covalent bond
B. triple covalent bond
C. double covalent bond
D. all of the above bonds are the same length
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B. Triple covalent bond
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Identify the strongest bond.
A. single covalent bond
B. triple covalent bond
C. double covalent bond
D. all of the above bonds are the same length
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B. Triple covalent bond
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Identify the bond with the highest bond energy.
A. O=O
B. N=N
C. Si=O
D. C=C
E. C=N
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E. C=N
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Give the approximate bond angle for a molecule with an octahedral shape.
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90°
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Determine the electron geometry (eg) and molecular geometry (mg) of PF₅.
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eg=trigonal bipyramidal, mg=trigonal bipyramidal
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The bond angle in NH₃ is
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107°
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Determine the electron geometry (eg) and molecular geometry (mg) of CO₂.
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eg=linear, mg=linear
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Determine the electron geometry (eg) and molecular geometry (mg) of NCl₃.
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eg=tetrahedral, mg=trigonal pyramidal
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Identify the number of electron groups around a molecule with a tetrahedral shape
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4
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Identify the number of electron groups around a molecule with a trigonal bipyramidal shape.
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5
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Identify the number of electron groups around a molecule with an octahedral shape.
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6
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Determine the electron geometry, molecular geometry and polarity of SF₆.
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eg=octahedral, mg=octahedral, nonpolar
