Phosphorous-32 Is a Beta Emitter with a Half-Life of 14

question 37

Multiple Choice

Phosphorous-32 is a beta emitter with a half-life of 14.3 days. So, after 42 days, a 100-mg sample will have decayed to 25 mg. Which statement best describes where the rest of the ³²P went?

• A) It disappeared.
• B) It reacted with air.
• C) It turned into sulfur and a beta particle.
• D) It turned into silicon and a beta particle.
• E) It decomposed into beta particles.

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