JJThomson Studied Cathode Ray Particles (Electrons)and Was Able to Measure

Multiple Choice

J.J.Thomson studied cathode ray particles (electrons) and was able to measure the mass/charge ratio.His results showed that

A) the mass/charge ratio varied as the cathode material was changed.
B) the charge was always a whole-number multiple of some minimum charge.
C) matter included particles much smaller than the atom.
D) atoms contained dense areas of positive charge.
E) atoms are largely empty space.