Cobalt-60 Is a Beta Emitter with a Half-Life of 5

question 112

Multiple Choice

Cobalt-60 is a beta emitter with a half-life of 5.3 years. Approximately what fraction of cobalt-60 atoms will remain in a particular sample after 26.5 years

• A) 1/5
• B) 1/16
• C) 1/26
• D) 1/32
• E) 1/64

---

Definitions:

Contributions

Offerings or inputs provided by individuals or groups towards a common goal or project.

Employees

Individuals who are hired by a company or organization to perform specific duties in exchange for compensation.

Condolence Letters

Brief personal messages written to comfort someone after the death of a loved one.

Timing

The selection of the best moment to initiate or execute an action to achieve a desired effect.