science
Grade-9
Easy
Question
Who discovered an electron?
- Thomson
- Bohr
- Einstein
- Dalton
Hint:
The electrons are discovered by J. J. Thomson.
The correct answer is: Thomson
- The electron was discovered by J. J. Thomson in the year 1897.
- Thomson conducted some experiments with cathode ray tubes which showed that the atoms contain tiny negatively charged particles.
- He called the negatively charged particles as electrons.
- Thomson proposed a model for atoms that says negatively charged particles are embedded in the positively charged particles.
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