The Activity of a Sample of Gas Obtained from a Basement

question 24

Multiple Choice

The activity of a sample of gas obtained from a basement containing radon-222 was found to be 8 pCi/L. This isotope has a half-life of 3.8 days. If no additional radon-222 entered the basement, how long would it take for the activity to decline to 1 pCi/L?

• A)about 4 days
• B)a bit more than 10 days
• C)about 1 day
• D)a bit less than 10 days
• E)about 20 days

---

Definitions:

Convert Power

A form of influence or control that is not openly acknowledged or displayed, often subtly exerted or hidden.

Take Initiative

The act of assessing and initiating things independently, often leading to innovation or the resolution of issues.

David McClelland

A psychologist known for his work on motivation theory, particularly the theory of Needs, including the concepts of Achievement, Power, and Affiliation motivations.

Institutional Managers

Managers operating within institutions or organizations, focusing on adherence to formal policies and strategies for achieving organizational goals.