A Certain Isotope Has a Specific Activity of 7

question 16

Multiple Choice

A certain isotope has a specific activity of 7.29 × 10^-4 Ci/g. How many α particles will a 75.0 mg sample emit in one hour?

• A) 9.99 × 10⁴
• B) 2.02 × 10⁶
• C) 7.28 × 10⁹
• D) 1.29 × 10¹²
• E) None of these choices are correct.

---

Definitions:

Behavior Modification

A therapeutic approach that seeks to change potentially self-destructive or unhealthy behaviors through reinforcement and punishment.

Biofeedback

A technique that teaches individuals to control bodily processes that are typically involuntary, through monitoring and feedback from electrodes.

Operant Conditioning

A method of learning that employs rewards and punishments for behavior, which was developed by B.F. Skinner to study behavior modification.

Biological Response

A physiological or biochemical reaction of an organism to a specific stimulus, including responses to environmental changes, stress, and diseases.