Multiple choice general knowledge math & puzzles

pitchblende is an ore of __ .

  1. silicon

  2. astatine

  3. plutonium

  4. radium
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D Correct answer
Explanation

Pitchblende, also known as uraninite, is primarily an ore of uranium. However, pitchblende was historically significant as the source from which Marie Curie discovered radium in 1898. The ore contains trace amounts of radium as a decay product of uranium. Silicon, astatine, and plutonium are not correct associations with pitchblende.

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