Approximately How Many Radioactive Atoms Are Present in a Tritium

question 33

Multiple Choice

Approximately how many radioactive atoms are present in a tritium sample with an activity of 0.4 x 10^-6 Ci and a half-life of 12.3 years? (1 Ci = 3.7 x 10¹⁰ decays/s)

• A)1.3 x 10⁸
• B)7 x 10⁸
• C)3 x 10¹⁰
• D)8 x 10¹²

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Definitions:

Mental Models

Internal representations of reality that people use to understand and interact with the world around them.

Transactive Memory Systems

A shared system for encoding, storing, and retrieving information within a group, enhancing collaborative efficiency.

Interdependence

A mutual reliance between groups or individuals, where each party depends on the others for success, survival, or well-being.

Necessary Conditions

Conditions that must be present for a certain event or outcome to occur, without which the event cannot take place.