The term ' radioactivity' was first used by
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Henri Becquerel
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Marie Curie
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Rutherford
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De broglie
B
Correct answer
Explanation
Marie Curie coined the term 'radioactivity' in 1898 to describe the spontaneous emission of radiation from atomic nuclei. Henri Becquerel discovered radioactivity (through uranium), but Curie named it. Rutherford contributed to nuclear physics understanding. De Broglie proposed wave-particle duality.