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MCAS Chemistry Exam Practice

Category - Chemistry

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A hospital buys a compound that contains an isotope of barium. Several months later, most of the barium has changed to the element lanthanum. Which of the following is responsible for this change?

exposure to air
radioactive decay
reactions with the container wall
absorption of moisture from the air

Explanation

Answer: B - radioactive decay

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MCAS Chemistry Exam Practice

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MCAS Chemistry Exam Practice

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