A Thallium Source with a Half-Life of 3

question 72

Multiple Choice

A thallium source with a half-life of 3.7 years was certified at 10 kBq ten years ago.What is its activity now?

• A)4.7 kBq
• B)3.3 kBq
• C)1.5 kBq
• D)1.0 kBq

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Definitions:

Aggressiveness

A behavior characterized by hostility or attack, often without a clear reason, stemming from a desire to dominate or assert power.

Developing Self-Understanding

The ongoing process of acquiring insight into one's own personality, emotions, motives, and behaviors, contributing to personal growth and self-awareness.

Uncooperative

Showing a lack of willingness to work with others or to be helpful in achieving a common goal.

Naughty

Behavior that is disobedient or mischievous, often used to describe children who do not follow rules or norms.