Look at the diagram of a voltaic cell below. Which half reaction occurs at the cathode in this cell?

A. 2CO⅔- ---> O2 + 2CO2 + 4e‐
B. O2 +2CO2 + 4e- ---> 2CO⅔-
C. 2H2 + 2CO⅔- ---> 2H2O + 2CO2 + 4e-
D. 2H2O + 2CO2 + 4e- ---> 2H2 + 2CO⅔-​

These traits describe either a chemical or a nuclear reaction. which statements describe a nuclear reaction? check all that apply. involves the loss, gain, or sharing of electrons may involve a change in total mass involve relatively low energy changes occur outside the nucleus involve very high-energy changes involve changes in nuclides when decay occurs