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CHEM121 Ex 3 Review Test

Enter the letter for the matching Answer
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1.
Identify the number of electron group around a molecule with sp hybridization.
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2.
Determine the electron geometry and then the molecular geometry of ICl_2^-.
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3.
Place the following elements in order of decreasing electronegativity. S, Cl, Se
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4.
Choose the bond below that is most polar. H-Cl, H-F, H-Br, H-I, C-H
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5.
Determine the electron geometry and then the molecular geometry of PF_5.
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6.
Give the number of valence electrons for SF_4.
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7.
Identify the compound with the lowest magnitude of lattice energy. CaO, KCl, KBr, SrO
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8.
True/False: An orbital that penetrates into the region occupied by core electrons is less shielded from nuclear charge than an orbital that does not penetrate and therefore has a lower energy.
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9.
Determine the electron geometry, molecular geometry and polarity of SF_6.
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10.
Give the set of four quantum numbers that could represent the last electron added to the Ne atom. n=3,l=2,ml=1,ms=- 1/2 n=3,l=0,ml=1,ms=- 1/2 n = 2, l = 1, ml = 1, ms = - 1/2 n = 3, l = 2, ml =1 , ms = + 1/2 n = 3, l = 1, ml = 1, ms = + 1
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11.
Describe a pi bond.
A.
2
B.
n = 2, l = 1, ml = 1, ms = - 1
C.
trigonal bipyramidal and linear
D.
Cl > S > Se
E.
trigonal bipyramidal and trigonal bipyramidal.
F.
octahedral, octahedral, nonpolar
G.
KBr
H.
H-F
I.
side by side overlap of p orbitals.
J.
34
K.
True
Type the Answer that corresponds to the displayed Question.
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12.
Place the following elements in order of decreasing atomic radius. Xe, Rb, Ar
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13.
Only two electrons, with opposing spins, are allowed in each orbital is known as the?
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14.
Give the approximate bond angle for a molecule with a tetrahedral shape.
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15.
Which of the following represent the Lewis structure for Ca^2+?
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16.
Place the following elements in order of increasing atomic radius. Ca^2+, S^2-, Cl^-
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17.
Identify the weakest bond.
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18.
Choose the compound below that should have the highest melting point according to the ionic bonding model. SrI_2, SrF_2, CaCl_2, SrBr_2, MgF_2
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19.
The condensed electron configuration of krypton, element 36, is?

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