Who discovered radioactivity?
Correct answer D. Becquerel
Explanation
Henri Becquerel discovered radioactivity in 1896 when uranium salts fogged photographic plates kept in the dark.
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See allDeuterium differs from Hydrogen in having:
Correct answer C. Same atomic number and different atomic weight
The chemical name of quartz is:
Correct answer A. Silicon Dioxide
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Correct answer A. Atomic number
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Correct answer B. Chlorofluorocarbons
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