The Isotope of Iodine with Mass Number 128 Undergoes Beta

question 120

Multiple Choice

The isotope of iodine with mass number 128 undergoes beta decay with a half-life of 25.00 minutes. How long will it take for 93.75% of a sample of pure ¹²⁸ I to decay

• A) 60.0 min
• B) 80.0 min
• C) 100. min
• D) 120. min
• E) None of the above

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