What is the name of the instrument J.J. Thomson helped develop to study positively charged particles?
Mass spectrograph
Electron microscope
Cyclotron
Geiger counter
Answer
J.J. Thomson, along with Francis William Aston, developed the mass spectrograph, an instrument used to study positively charged particles. This device allowed them to determine the nature of these particles and led to the discovery of isotopes of stable elements.
Unlocking the Secrets of the Atom: The J.J. Thomson Chronicles!