The Half-Life of Radioactive Technetium-99 Is 6

question 66

Multiple Choice

The half-life of radioactive Technetium-99 is 6.0 hours.Find the number of ⁹⁹Tc nuclei necessary to produce a sample of activity 1.9 µCi.(1 Ci = 3.7 × 10¹⁰ decays/second)

• A)5.9E-2
• B)2.2E+9
• C)1.5E+9
• D)6.1E+5
• E)​4.2E+5

---

Definitions:

U.S. Constitution

The supreme law of the United States of America, outlining the national framework of government, and the fundamental rights and freedoms of its citizens.

Symbolic Speech

Nonverbal conduct that expresses opinions or thoughts about a subject. Symbolic speech is protected under the First Amendment’s guarantee of freedom of speech.

Commercial Speech

Speech or expression done by an individual or entity for the purpose of making a profit or promoting a product or service.

Bad Taste

An expression used to describe something that is aesthetically, morally, or socially deemed to be unpleasant or offensive.