Fermium-253 Has a Half-Life of 3

question 21

Multiple Choice

Fermium-253 has a half-life of 3.00 days. A sample of fermium has 7.37 × 10⁷ nuclei. How long will it take for there to be only 3.36 × 10⁶ fermium nuclei in this sample?

• A) 2.75 days
• B) 9.80 days
• C) 13.4 days
• D) 15.7 days
• E) 58.6 days

---

Definitions:

Balance of Payments

A financial statement that summarizes a country's financial transactions with the rest of the world for a specific period.

Rate of Exchange

The value of one currency for the purpose of conversion to another, indicating how much foreign currency can be exchanged for a unit of domestic currency.

Rate of Exchange

The price at which one currency can be exchanged for another, determining how much of one currency can be purchased with another currency.

Exchange Rate

The value of one country's currency in terms of another currency.