6 Questions
Which experiment led to the discovery of the electron?
Cathode-rays experiment
What is the charge of electrons?
Negative
What is the nucleus of an atom?
A small, positively charged center of the atom
What is the conclusion drawn from the cathode rays experiment?
Gases conduct electricity when the pressure is reduced to 0.001 mmHg
What is the difference between isotopes of the same element?
Same atomic numbers and different mass numbers
What is the structure of the atom according to Rutherford's experiment?
The atom has a complicated structure that resembles the solar system
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.
"Discovering the Electron: The Cathode-Rays Experiment Quiz" - Test your knowledge about the groundbreaking experiment that led to the discovery of the electron. Learn about the behavior of gases under different conditions of pressure and temperature, and how the flow of invisible rays was observed in low-pressure gas tubes. Challenge yourself with questions on the history and science of the cathode-ray experiment, and understand the significance of this discovery in modern physics.
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