What was JJ Thompson's experiment about?

Answer 1

Thompson's model described that every atom had an electron and he tried to incorporate the electron into the model of the atom... He prooved the Greeks wrong because they initially thought that the atom was solid.(This also prooved Dalton to be incorrect also)

All in all JJ Thompson discovered the electron!

Answer 2

JJ Thomson, was the first to demonstrate that atoms are actually composed of aggregates of charged particles. Prior to his work, it was believed that atoms were the fundamental building blocks of matter. The first evidence contrary to this notion came when people began studying the properties of atoms in large electric fields.

Answer 3

His most famous was the Cathode Ray Experiment.

It was about electrical discharges in partially evacuated tubes (cathode-ray tubes). Found that when high voltage was applied to a tube, a "ray" he called a cathode ray (because it emanated from the negative electrode, or cathode) was produced. Because this ray was produced at the negative electrode and was repelled by the negative pole of an applied electric field, Thomson postulated that the ray was a stream of negatively charged particles (now called electrons).

He determined the charge-to-mass ratio of an electron:

e/m = -1.76 X 10^8 C/g

coulombs (C)

grams (g)

He also postulated all atoms contained electrons. Because all atoms were known to be electrically neutral, he assumed that atoms also must contain some positive charge. Then he postulated that an atom consisted of a diffuse cloud of positive charge with the negative electrons embedded randomly in it.

-(Plum Pudding Model of the atom)

Answer 4

I heard you're from Prairie High School.

Maybe you should go as Mrs. Jabens.