Who is JJ Thomson and what did he discover about the atom?

Answer 1

1st Experiment: He constructed a Cathode Ray and concluded that the negative charge was inseparable from the rays. 2nd Experiment: He investigated whether or not the rays could be deflected by an electric field. He found that the rays really did bend, which indicated a negative charge. 3rd Experiment: He measured the charge-to-mass ratio of the cathode rays by measuring how much they were deflected by a magnetic field and how much energy they carried. He concluded that cathode rays were indeed made of particles which he called "corpuscles." These were later named electrons. Scientific Contributions: · Thompson created the first model that suggested positive and negative charges known as the "plum pudding" model. Thompson discovered that electrons were subatomic particles

Answer 2

Sir Joseph John "J.J." Thomson

• lived 1856-1940
• Nobel Laureate
• discovered the electron and isotopes
• invented mass spectrometer

Responsible for the experiment with a pumped-out glass bulb, in which an electric circuit is completed by electrons emitted from a hot wire, is credited to the US inventor Thomas Alva Edison (1847-1931), who patented it in 1883. The phenomenon is known as the "Edison effect" and many electronic devices use it nowadays. Experiments with beams of negative particles were performed in Britain by Joseph John ("J.J.") Thomson, and led to his conclusion in 1897 that they consisted of lightweight particles with a negative electric charge, nowadays known as electrons. Thomson was awarded the 1906 Nobel Prize.

Answer 3

He used a radioactive material to produce a beam of electrons and shot it at a screen using his simple Cathode ray. It is more or less how an old television set (the one that bulges out, not the digital flat screen TV) works.

Answer 4

A nobel prize winner and he discovered the proporties of the electron. He also enlightened us on isotopes. He played the private role in developing the understanding of the eletron.

Answer 5

Joseph John Thomson discovered that thee was a negatively charged particle in the atom. He is credited with discovering the electron. He also invented the mass spectrometer.

Answer 6

He suggest as there are some particles around the nucleus.

Answer 7

He used a new version of William Crooke's apperatus (it was like a gas discharge tube) and eventually found the electron. He is known as "the father of the electron."

Answer 8

The electron

Answer 9

He discovered electrons