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2018 BGCSE Physics Paper-1 Question-38
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Q-50
A radioactive tracer is a radioactive isotope that is injected into the body to investigate the function of an organ. Which two properties best describe an isotope used as a tracer in this way?
A long half-life and a gamma emitter
A short half-life and a gamma emitter
A long half-life and an alpha emitter
A short half-life and an alpha emitter
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