Very hard

Copper can be converted into gold by ?

Correct answer: A. Artificial radioactivity

  • A. Artificial radioactivity
  • B. heating
  • C. Electroplating
  • D. Chemical reaction

Explanation

Copper can be changed into gold only by nuclear transmutation, in which the atomic nucleus is altered, not by heating or an ordinary chemical reaction. Artificial nuclear reactions are therefore the closest listed option.

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