Q.

Radioactivity was discovered by

A. J.J. Thomson
B. W.Roentgen
C. H.Becquerel
D. M. Curie
Answer» C. H.Becquerel
Explanation: Antoine-Henri Becquerel is known for his discovery of radioactivity, for which he received the Nobel Prize for Physics in 1903. Unstable atomic nuclei will spontaneously decompose to form nuclei with a higher stability.
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