Discuss the discoveries and contributions of J ... - SS2 Chemistry Atomic Structure and Periodicity Question

J.J. Thomson conducted experiments with cathode rays and made significant contributions to our understanding of atomic structure. He discovered the existence of electrons, which are negatively charged subatomic particles, through his cathode ray tube experiments. Thomson proposed the "plum pudding" model of the atom, where electrons were embedded in a positively charged sphere.

Thomson's experiments demonstrated that atoms were not indivisible, as Dalton had initially suggested. Instead, they consisted of smaller, negatively charged particles. This discovery laid the groundwork for further investigations into the structure of atoms.