Question

MCQ : Radioactivity was first recognised while working with which element?

  • Matter: Atomic structure
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Answer

Question

Radioactivity was first recognised while working with which element?

  1. Uranium
  2. Thorium
  3. Polonium
  4. Barium

Answer

uranium

Explanation

Radioactivity was first recognized while working with uranium. In 1896, Henri Becquerel discovered that uranium salts emitted penetrating rays that could expose photographic plates, leading to the discovery of radioactivity.

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