A diagram of a simple cell is shown - HSC - SSCE Chemistry - Question 7 - 2015 - Paper 1

In a galvanic cell, such as the one depicted in the diagram, oxidation and reduction reactions occur at the electrodes. The copper electrode functions as the anode, losing electrons to the electrolyte, which leads to a decrease in mass as copper ions enter solution. Therefore, the correct choice here is (B) The copper electrode loses electrons, as it accurately reflects the process happening in the electrochemical cell when it operates.