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Questions and Answers
Which experiment led to the discovery of the electron?
Which experiment led to the discovery of the electron?
- Rutherford's experiment
- Cathode-rays experiment (correct)
- Thomson's experiment
- Geiger and Marsden's experiment
What is the charge of electrons?
What is the charge of electrons?
- Neutral
- It varies
- Positive
- Negative (correct)
What is the nucleus of an atom?
What is the nucleus of an atom?
- A space between the orbits of electrons
- A complicated structure that resembles the solar system
- A small, positively charged center of the atom (correct)
- A positively charged particle
What is the conclusion drawn from the cathode rays experiment?
What is the conclusion drawn from the cathode rays experiment?
What is the difference between isotopes of the same element?
What is the difference between isotopes of the same element?
What is the structure of the atom according to Rutherford's experiment?
What is the structure of the atom according to Rutherford's experiment?
Flashcards
Experiment to discover the electron?
Experiment to discover the electron?
Cathode-rays experiment
Charge of electrons?
Charge of electrons?
Negative
What is the nucleus?
What is the nucleus?
A small, positively charged center of the atom
Conclusion from cathode rays experiment?
Conclusion from cathode rays experiment?
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Difference between isotopes?
Difference between isotopes?
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Structure of atom (Rutherford)?
Structure of atom (Rutherford)?
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Study Notes
Discovery of the Electron
- The cathode rays experiment led to the discovery of the electron.
Properties of Electrons
- Electrons have a negative charge.
Atomic Structure
- The nucleus is the central part of an atom, containing protons and neutrons.
Cathode Rays Experiment
- The cathode rays experiment concluded that cathode rays are composed of tiny, negatively charged particles called electrons, which are emitted from the cathode.
Isotopes
- Isotopes of the same element have the same number of protons (atomic number) but differ in the number of neutrons (atomic mass).
Rutherford's Experiment
- According to Rutherford's experiment, the atom has a small, dense nucleus at its center, surrounded by electrons orbiting at a distance.
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