If Three Samples Have the Half-Lives Listed Below,which Is the Most

question 105

Multiple Choice

If three samples have the half-lives listed below,which is the most radioactive?

• A)a sample with a half-life of 20 minutes
• B)a sample with a half-life of 20 hours
• C)a sample with a half-life of 20 years
• D)a sample with a half-life of 20 million years
• E)none of the above

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Definitions:

Diastereomers

Stereoisomers that are not mirror images of each other, differing in the configuration at one or more (but not all) of the chiral centers in molecules.

Chiral

Describes a molecule that is not superimposable on its mirror image, often leading to different reactions or interactions for each form.

Diastereomer

Molecules that are stereoisomers, not mirror images of each other and have more than one chiral center.

Diastereomers

Isomers of the same stereo configuration that differ in their physical properties and do not act as mirror images of each other.