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J.J. Thomson discovered the electron by noticing that: A. molecules with the same atoms exhibited the same chemical properties. OB. a beam of particles could be influenced by an electric or magnetic force. C. chemical compounds contained various combinations of at least two atoms. D. some particles in a beam were deflected when passed through a sheet of gold foil. ​

JJ Thomson discovered the electron by noticing that A molecules with the same atoms exhibited the same chemical properties OB a beam of particles could be influ class=

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J.J. Thomson discovered the electron by noticing that a beam of particles could be influenced by an electric or magnetic force and is denoted as option B.

What is an Electron?

This is referred to a subatomic particle which has a negative charge present and is involved in chemical reactions.

J.J. Thomson noticed that cathode rays were negatively charged due to deflection by magnetic and electric forces which signifies the presence of a negative particle.

Read more about J.J. Thomson here https://brainly.com/question/15361325

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