Radioactive Decay: a Certain Substance Has a Half-Life of 5

question 67

Multiple Choice

Radioactive decay: A certain substance has a half-life of 5.0 hours. How many nuclei of the substance are required to give an initial activity of 6.0 μCi? 1 Ci = 3.7 × Bq.

• A) 5.8 ×
• B) 8.5 ×
• C) 6.3 ×
• D) 3.2 ×
• E) 2.4 ×

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Definitions:

Earnings Per Share

A financial metric that calculates the portion of a company’s profit allocated to each outstanding share of common stock, indicating a company's profitability.

Common Stock

Equity ownership in a corporation, providing voting rights and potential dividends to shareholders.

Dividends

Disbursements issued by a company to its shareholders, often as an allocation of earnings.

Dividend Yield Ratio

A financial metric indicating the annual dividends a company distributes in comparison to its stock price.