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J.J. Thomson discovered electrons are negative by conducting experiments with cathode rays in vacuum tubes. He observed how the rays were attracted to a positively charged plate, leading him to conclude that the particles in the rays carried a negative charge, which he named electrons.
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When did JJ Thomson discover the electron?
J.J. Thomson discovered the electron in 1897 while conducting experiments on cathode rays. He observed that these rays could be deflected by electric and magnetic fields, leading him to propose the existence of a negatively charged particle within the atom, which he named the electron.
How did jj Thomson figure out his theory?
J.J. Thomson discovered the electron through his experiments with cathode rays in a vacuum tube. By measuring the charge-to-mass ratio of the electrons, he concluded that they were fundamental particles. This led to the development of the plum pudding model of the atom.
Why did jj Thomson do his experiment?
J.J. Thomson performed his experiment to discover the existence of subatomic particles known as electrons. By studying the properties of cathode rays, he was able to determine the charge-to-mass ratio of electrons and propose the plum pudding model of the atom.
What is JJ Thomson model called?
The JJ Thomson model is called the "plum pudding model." It suggests that atoms consist of a diffuse positive charge with negatively charged electrons embedded within it, similar to plums within a pudding.
What were JJ Thomson's discovery?
J.J. Thomson discovered the electron in 1897, showing that atoms were made up of smaller particles. This led to the development of the plum pudding model of the atom. He also measured the charge-to-mass ratio of the electron.
