23) Key Concept How are atomic and molecular orbitals related?Hint
(24) Key Concept Explain how the VSEPR theory can be used to predict the shapes of molecules.Hint
(25) Key Concept How is orbital hybrization useful in describing molecules?Hint
(26)What shape would you expect a simple carbon-containing compound to have if the carbon atom has the following hybridizations?
a. sp2
b. sp3
c. sp
(27)What is a sigma bond? Describe, with the aid of a diagram, how the overlap of two half-filled 1s orbitals produces a sigma bond?
(28)How many sigma and how many pi bonds are in an ethyne molecule (C2H2)?
(29)The BF3 molecule is planar. The attachment of a fluoride ion to the boron in BF3, through a coordinate covalent bond, creates the BF4− ion. What is the geometric shape of this ion?
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