Table of Contents
- 1 What did Thomson conclude about the particles mass?
- 2 What conclusions did Thomson make about the particle he discovered?
- 3 What did Rutherford conclude about particles?
- 4 Why did J J Thomson conclude that cathode rays had mass?
- 5 Who was involved in the cathode ray experiment?
- 6 What was the result of JJ Thomson’s experiment?
What did Thomson conclude about the particles mass?
Thomson also measured the mass of the particles he had identified. He did this by determining how much the cathode rays were bent when he varied the voltage. He found that the mass of the particles was 2000 times smaller than the mass of the smallest atom, the hydrogen atom.
What conclusions did Thomson make about the particle he discovered?
He concluded that the particles making up the rays were 1,000 times lighter than the lightest atom, proving that something smaller than atoms existed. Thomson likened the composition of atoms to plum pudding, with negatively-charged “corpuscles” dotted throughout a positively-charged field.
What did Rutherford conclude about particles?
The amazed Rutherford commented that it was “as if you fired a 15-inch naval shell at a piece of tissue paper and the shell came right back and hit you.” From this simple observation, Rutherford concluded that the atom’s mass must be concentrated in a small positively-charged nucleus while the electrons inhabit the …
What did Thomson discover?
In 1897 Thomson discovered the electron and then went on to propose a model for the structure of the atom. His work also led to the invention of the mass spectrograph.
What was Bohr’s model called?
planetary model
According to the Bohr model, often referred to as a planetary model, the electrons encircle the nucleus of the atom in specific allowable paths called orbits.
Why did J J Thomson conclude that cathode rays had mass?
Atoms. Why did J.J. Thomson conclude that cathode rays were made up of small particles that had mass? because they could be bent by a magnet as they passed through the vacuum tube. A(n) __________ is a material that cannot be broken down into simpler materials by ordinary means.
Who was involved in the cathode ray experiment?
J. J. Thomson Experiment – The Discovery of Electron Cathode ray experiment was a result of English physicists named J. J. Thomson experimenting with cathode ray tubes. During his experiment he discovered electron and it is one of the most important discoveries in the history of physics.
What was the result of JJ Thomson’s experiment?
After completing the experiment J.J. Thomson concluded that rays were and are basically negatively charged particles present or moving around in a set of a positive charge. This theory further helped physicists in understanding the structure of an atom.
How are cathode rays observed in a vacuum tube?
Cathode rays are streams of electrons observed in vacuum tubes (also called an electron beam or an e-beam). If an evacuated glass tube is fitted with two electrodes and a voltage is applied, it is observed that the glass opposite the negative electrode glows from the electrons emitted from the cathode. How did JJ Thomson find the electron?