How Many Atoms of Zinc-69 Remain After a Sample of 500,000

question 37

Multiple Choice

How many atoms of zinc-69 remain after a sample of 500,000 zinc-69 atoms decays for a period of 165 minutes? The half-life time for zinc-69 is 55 minutes.

• A) 500,000 atoms
• B) 62,500 atoms
• C) 250,000 atoms
• D) 125,000 atoms

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Definitions:

Increasing

A term indicating growth or an upward trend in quantitative measures or metrics, such as increasing sales, profits, or productivity.

Increasing

Refers to a situation or quantity that is becoming greater over time.

Annual Growth Rate

The percentage increase in the value of a particular investment or portfolio over the period of a year.

Discounting

The process of determining the present value of a future amount of money or stream of cash flows given a specific rate of return.