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Q. |
The phenomenon of radioactivity was discovered by - |
A. | Marie Curie |
B. | Pierre Curie |
C. | Henri Becquerel |
D. | J.J Thomson |
Answer» C. Henri Becquerel | |
Explanation: In 1896 Henri Becquerel was using naturally fluorescent minerals to study the properties of x-rays, which had been discovered in 1895 by Wilhelm Roentgen. |
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