Homework Statement
Which of the following reactions could not occur because they would violate conservation of charge
(n=neutron, p=proton, e- = electron, he^2+ = the helium nucleus)
a) p -> n + e-
b) n -> p + e-
c) He^2+ + He^2+ -> He^2+ p + n
d) p + He^2+ -> He^2+ + e-
e) p + p +...