J.J. Thomson, Philos. Mag. 44, 293 Cathode Rays. J.J. Thomson ...
J.J. Thomson His model of the atom. Covered in this lesson This lesson explains JJ Thomson's...
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Transcript of J.J. Thomson His model of the atom. Covered in this lesson This lesson explains JJ Thomson's...
![Page 1: J.J. Thomson His model of the atom. Covered in this lesson This lesson explains JJ Thomson's experiments that led to the discovery of the electron. –](https://reader036.fdocuments.in/reader036/viewer/2022072014/56649ea75503460f94baa5df/html5/thumbnails/1.jpg)
J.J. Thomson
His model of the atom
![Page 2: J.J. Thomson His model of the atom. Covered in this lesson This lesson explains JJ Thomson's experiments that led to the discovery of the electron. –](https://reader036.fdocuments.in/reader036/viewer/2022072014/56649ea75503460f94baa5df/html5/thumbnails/2.jpg)
Covered in this lesson
• This lesson explains JJ Thomson's experiments that led to the discovery of the electron.
– The discovery of negatively charged electrons smaller than the atom using a cathode ray tube.
![Page 3: J.J. Thomson His model of the atom. Covered in this lesson This lesson explains JJ Thomson's experiments that led to the discovery of the electron. –](https://reader036.fdocuments.in/reader036/viewer/2022072014/56649ea75503460f94baa5df/html5/thumbnails/3.jpg)
Cathode Ray Tube
• A cathode ray tube is a glass tube with most of the air taken out and metal on both ends.
• An electrical current is applied (electron beam)
(diagram wikipedia)
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Discovery of the Particles, We Call Electrons
• J.J. Thomson found the beam was deflected by electric and magnetic fields.
• He determined the beam consisted of negatively charged particles smaller than atoms that we now call electrons.
• He found electrons in atoms of various metals and suggested they are found in all atoms.
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J. J. Thomson’s Model
J.J. Thomson’s model of the atom consists of a sphere filled with a positively charged cloud containing negative particles (electrons) spread throughout the cloud.
(diagram wikipedia)