A Certain Isotope Has a Specific Activity of 7 $\alpha$ Particles Will a 75

question 61

Multiple Choice

A certain isotope has a specific activity of 7.29 * 10¯⁴ Ci/g. How many $\alpha$ particles will a 75.0 mg sample emit in one hour?

• A) 9.99 *10⁴
• B) 2.02 * 10⁶
• C) 7.28 * 10⁹
• D) 1.29* 10¹²
• E) None of these choices is correct.

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