Barium - 122 Has a Half-Life of 2 Minutes

question 48

Multiple Choice

Barium - 122 has a half-life of 2 minutes. You just obtained a sample weighing 10.0 grams. It takes 10 minutes to set up the experiment in which barium - 122 will be used. How many grams of barium - 122 will be left when you begin the experiment?

• A) 0.00 g remain
• B) 0.313 g remain
• C) 0.625 g remain
• D) 2.00 g remain
• E) 50.0 g remain

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