Fermium-253 Has a Half-Life of 3

question 54

Multiple Choice

Fermium-253 has a half-life of 3.00 d. A sample of fermium contains 7.37 × 10⁷ nuclei. How long will it take for there to be only 3.36 × 10⁶ fermium nuclei in this sample?

• A) 2.75 d
• B) 9.80 d
• C) 13.4 d
• D) 15.7 d
• E) 58.6 d

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Definitions:

Sensation Seeking Scale

A psychological assessment tool designed to measure an individual's propensity for seeking varied, novel, complex, and intense sensations and experiences.

Daydreams

Spontaneous, self-generated thoughts and imaginations that occur while a person is awake, often reflecting desires, fears, or creative thinking.

Unrealistic Optimism

A cognitive bias causing a person to believe they are less likely to experience negative events and more likely to experience positive events.

Pessimism

A tendency to see the worst aspect of things or believe that the worst will happen.