Using a cathode ray tube, Thomson confirmed that

Question

atoms must have an overall positive charge.
atoms include particles that have a negative charge.
electrons in atoms must have varying amounts of energy.
electrons are only found in the nucleu

Answer 1

Using a cathode ray tube, J.J. Thomson confirmed that atoms include particles that have a negative charge. His experiments led to the discovery of the electron, demonstrating that atoms contain smaller negatively charged particles.