In a chemical reaction, ------participate

Options :
  1. all the electrons
  2. valence electron
  3. protons
  4. electron and proton
Answer and Explanation :-

Answer: Option 2

Explanation:

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[Some scientific] experiments.tell us that what we consider the objective world depends in some measure on our own conscious processes. There is no fixed eternal reality... true understanding is not to be achieved with the rational mind. Larry Dossey, Space, Time
-Medicine