Who discovered radioactivity?

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Multiple Choice

Who discovered radioactivity?

Explanation:
Radioactivity is the spontaneous emission of radiation by certain materials. Henri Becquerel, in 1896, found that uranium salts could expose a photographic plate even without any light or external energy, showing that the material itself was emitting radiation. This accidental observation identified radioactivity as a natural property of some substances. Wilhelm Roentgen’s discovery of X-rays in 1895 is a different phenomenon—X-rays come from electrical production in a tube, not from a substance’s spontaneous emission. The Curies later expanded the study and coined the term radioactivity, isolating new radioactive elements, but the initial discovery belongs to Becquerel.

Radioactivity is the spontaneous emission of radiation by certain materials. Henri Becquerel, in 1896, found that uranium salts could expose a photographic plate even without any light or external energy, showing that the material itself was emitting radiation. This accidental observation identified radioactivity as a natural property of some substances. Wilhelm Roentgen’s discovery of X-rays in 1895 is a different phenomenon—X-rays come from electrical production in a tube, not from a substance’s spontaneous emission. The Curies later expanded the study and coined the term radioactivity, isolating new radioactive elements, but the initial discovery belongs to Becquerel.

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