Foundational Chemistry Conceptreview

Figure 2.24 Molecules that have the same number and type of atoms arranged differently are called isomers.

(a) Structural isomers have a different covalent arrangement of atoms. (b) Geometric isomers have a different

arrangement of atoms around a double bond. (c) Enantiomers are mirror images of each other.

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Which of the following statements is false?

Molecules with the formulas CH3CH2COOH and C3H6O2 could be structural isomers.

Molecules must have a double bond to be cis-trans isomers.

To be enantiomers, a molecule must have at least three different atoms or groups connected to a

central carbon.

To be enantiomers, a molecule must have at least four different atoms or groups connected to a central

carbon.

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a. one

b. two

c. six

d. four

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a. sodium

b. hydroxyl

c. phosphate

d. carbonyl

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