How Long Does It Take for 5

question 9

Multiple Choice

How long does it take for 5.05 g of a radioactive isotope to decay to 0.0505 g if its half-life is 20,000 y?

• A) 205,000 y
• B) 505,000 y
• C) 313,000 y
• D) 331,000 y
• E) 133,000 y

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Definitions:

Role Model

An individual admired for their qualities or achievements and regarded as an example to be imitated.

Emulate

Attempting to match or surpass someone or something by imitation or to replicate their success as a model.

Decision

The act of making a choice among available alternatives, often considered within the context of problem-solving or therapy.

Significant Influence

A substantial impact on or effect in determining the behavior, opinions, or development of someone or something.