Q.

Natural radioactivity was discovered by -

A. Marie Curie
B. Ernest Rutherfor
C. Henri Becquerel
D. Enrico Fermi
Answer» C. Henri Becquerel
Explanation: The Discovery of Radioactivity. 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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