JAMB - Chemistry (2024 - No. 67)
The scientist that performed the experiment on discharged tubes that led to the discovery of the cathode rays as a sub-atomic particle is
J.J Thomson
Robert Millikan
Ernest Rutherford
Niels Bohr
Uitleg
J.J. Thomson performed the cathode ray tube (CRT) experiment that led to the discovery of the electron and cathode rays as subatomic particles.
Robert Millikan succeeded in precisely determining the magnitude of the electron's charge.Millikan's discovery that electron charge can be quantified led to an accepted value for e\(^-\), which is now a fundamental scientific constant.
Ernest Rutherford discovered alpha and beta rays, set forth the laws of radioactive decay, and identified alpha particles as helium nuclei.
Bohr's model of the atom describes how electrons orbit a nucleus in defined energy levels. Electrons can move between orbits by absorbing or emitting energy.