A Radioactive Isotope Decays by β^- Emission with a Half-Life

question 53

Multiple Choice

A radioactive isotope decays by β^- emission with a half-life of 1.0 min.During the first 1.0 min,a particular sample emits 1000 β^- particles.During the next 1.0 min,the number of β^- particles this sample will emit will be closest to

• A) 250.
• B) 500.
• C) 1000.
• D) 1500.
• E) 2000.

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Definitions:

Investment Company

A corporation or trust engaged in the business of investing the pooled capital of investors in financial securities.

Risk Aversion

The tendency of investors to prefer safer or less risky investments over riskier options.

Historical Standard Deviation

A statistical measure of market volatility based on past price movements.

Expected Return

The anticipated amount of profit or loss an investment is projected to generate.