1. this graph shows the energy involved in a reaction involving two molecules. describe what is happening or what the state of the reaction is at a, b, c, and d. then tell if this is an exothermic or an endothermic reaction.

Which statement best summarizes the importance of ernest rutherford’s gold foil experiment? it proved that all of john dalton’s postulates were true. it verified j. j. thomson’s work on the atomic structure. it showed that an electron circles a nucleus in a fixed-energy orbit. it showed that a nucleus occupies a small part of the whole atom.