Select all correct answers. in the cathode ray tube experiment, j. j. thomson passed an electric current through different gases inside a cathode ray tube in the presence of an electric field. in which two ways did this experiment change scientists’ understanding of the atom? it showed that atoms combine in different proportions. it showed that atoms can be divided into smaller parts. it showed that all atoms of the same element are similar. it showed that individual atoms could be destroyed. it showed that all atoms contain electrons.