Multiple choice

Radioactivity

  1. 1879

  2. 1880

  3. 1896

  4. 1830
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Henri Becquerel discovered radioactivity in 1896 while studying uranium salts. He noticed they exposed photographic plates even in darkness, revealing that certain materials emit radiation spontaneously without external energy input.

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