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Why was Becquerel’s experiment a first step in discovering radioactivity?
A. It showed that a substance could phosphoresce when it was not exposed to light.
B. It showed that the substance that was used by Becquerel could phosphoresce.
C. It showed that a substance could constantly emit radiation even if it was not exposed to light.
D. It showed that a substance emitted radiation when it was exposed to light.
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Why was Becquerel’s experiment a first step in discovering radioactivi...
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