A Sphere Made of a Radioactive Isotope Initially Has a Mass

question 75

Multiple Choice

A sphere made of a radioactive isotope initially has a mass of 6.88 kg. The half-life of this isotope is 1.34 h, and it decays by β- emission. At the end of 2.68 h, what is the mass of this sphere?

• A) 6.88 kg
• B) 3.44 kg
• C) 1.72 kg
• D) 2.53 kg

---

Definitions:

Unrelated Links

Hyperlinks on a webpage that lead to external content or websites with no direct relevance to the current page’s content.

Federal Trade Commission (FTC)

A United States government agency established to protect consumers and promote competition, dealing with issues related to antitrust, consumer protection, and business regulation.

Social Media Content Producers

Individuals or entities that generate and publish content on social media platforms to engage with an audience.

Transparent Sponsorships

Transparent sponsorships are marketing agreements where the sponsor's involvement and contributions to a project, event, or content are openly disclosed to the audience, fostering trust and credibility.