They both have types of waves to function, that makes them related. Ways they are different is one can travel in space, the other one cant.
During nuclear reactions some mass might be converted into energy and some energy might be converted into mass
Cl (chloride) have negative charge Cl-, and it's called an anion bcz when an atom gains one or more electrons, a negative ion is formed, which makes the atom has more electrons than protons.
that is a physical change
