Chemistry: Matter and Change

Section 4: Molecular Shape

Self Check Quizzes

1
Many simple molecules contain two lone pairs around the central atom. Which type of electron–to–electron repulsions are smallest in these molecules?

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A)bonding pair to bonding pair
B)bonding pair to lone pair
C)lone pair to lone pair
D)All repulsions are equal.
2
In the CH4 molecule, how many faces does the tetrahedral shape formed by the sp3 orbitals have?

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A)3
B)4
C)5
D)6
3
In the BeCl2 molecule, explain why the central atom is not surrounded by eight electrons.

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A)The chlorine atoms have pulled the extra electrons away.
B)Beryllium does not complete an octet because its atomic number is too low.
C)Beryllium has lost its other electrons.
D)Beryllium and chlorine form double bonds.
4
What hybridization is present in an trigonal bipyramedal molecular geometry?

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A)sp2
B)sp3
C)sp3d
D)sp3d2
5
In the trigonal planar molecular geometry, how many unshared pairs are present around the central atom?

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A)0
B)1
C)2
D)3
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