Answer:
B CU2+ +2e- -> Cu
Explanation:
reduction means something opposite of the word
reduction means an electron is GAINED in the part before the arrow
it's the " + 2e- " part of the equation before the arrow or "->" part
oxidation is the LOSING of an electron so it would show up to the right of arrow or "->" of the equation as "+2e-"
both reduction & oxidation reactions are called "redox"
in a battery
anode is oxidation
cathode is reduction
anode is positive
cathode is negative electrode
decomposing compounds is electrolysis.
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