The missing symbols are; 1) 4/2He 2) 4/2He 3) 0/-1e 4) 65/31Cu 5) 0/-1e
What is a nuclear reaction?
A nuclear reaction is a process in which the composition or structure of an atomic nucleus is altered. Nuclear reactions primarily influence an atom's nucleus, in contrast to chemical reactions, which are controlled by chemical bonds and include changes in the arrangement of electrons.
The production of new elements, the release of energy, and changes in the mass of the involved nuclei are all possible outcomes of these processes.