What did JJ Thomson discover experiment?

What did JJ Thomson discover experiment?

In 1897, J.J. Thomson discovered the electron by experimenting with a Crookes, or cathode ray, tube. He demonstrated that cathode rays were negatively charged. In addition, he also studied positively charged particles in neon gas.

What was JJ Thomson’s theory?

In 1897, J. J. Thomson discovered the first subatomic particle, the electron, while researching cathode rays. To explain the neutrality of atoms, Thomson proposed a model of the atom in which negative electrons are scattered throughout a sphere of positive charge. He called his atom the plum pudding model.

What did JJ Thomson discover simple?

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.

How did JJ Thomson prove his theory?

Halfway down the tube were two electric plates, producing a positive anode and a negative cathode, which he hoped would deflect the rays. As he expected, the rays were deflected by the electric charge, proving beyond doubt that the rays were made up of charged particles carrying a negative charge.

Who was Thomson and what did he discover?

Thomson, in full Sir Joseph John Thomson, (born December 18, 1856, Cheetham Hill, near Manchester, England—died August 30, 1940, Cambridge, Cambridgeshire), English physicist who helped revolutionize the knowledge of atomic structure by his discovery of the electron (1897).

What 3 things did J.J. Thomson discover?

J. J. Thomson took science to new heights with his 1897 discovery of the electron – the first subatomic particle….Atoms

• Pressure of a gas. Boyle’s Law.
• Thermal effusion.
• Sketch of a chemical theory.
• Theory of quantivalence.
• Valency of the various [chemical] elements.

Where did JJ Thomson discover the electron?

Joseph John Thomson (J. J. Thomson, 1856-1940; see photo at American Institute of Physics) is widely recognized as the discoverer of the electron. Thomson was the Cavendish professor of Experimental Physics at Cambridge University and director of its Cavendish Laboratory from 1884 until 1919.

What was JJ Thomson best known for?

On his return from America, he achieved the most brilliant work of his life – an original study of cathode rays culminating in the discovery of the electron, which was announced during the course of his evening lecture to the Royal Institution on Friday, April 30, 1897.

When was JJ Thomson’s experiment?

On April 30, 1897, British physicist J.J. Thomson announced his discovery that atoms were made up of smaller components. This finding revolutionized the way scientists thought about the atom and had major ramifications for the field of physics.

What did J.J. Thomson discover for kids?

(1856–1940). The renowned British physicist J.J. Thomson was the discoverer of the electron.

What 3 things did J.J. Thomson discover?

J. J. Thomson took science to new heights with his 1897 discovery of the electron – the first subatomic particle….Atoms

• Pressure of a gas. Boyle’s Law.
• Thermal effusion.
• Sketch of a chemical theory.
• Theory of quantivalence.
• Valency of the various [chemical] elements.

What was JJ Thomson best known for?

On his return from America, he achieved the most brilliant work of his life – an original study of cathode rays culminating in the discovery of the electron, which was announced during the course of his evening lecture to the Royal Institution on Friday, April 30, 1897.

Why was JJ Thomson’s discovery important?

Thomson announced his discovery that atoms were made up of smaller components. This finding revolutionized the way scientists thought about the atom and had major ramifications for the field of physics. Though Thompson referred to them as “corpuscles,” what he found is more commonly known today as the electron.

Where did JJ Thomson discovered the electron?

Thomson attended Trinity College at Cambridge, where he would come to head the Cavendish Laboratory. His research in cathode rays led to the discovery of the electron, and he pursued further innovations in atomic structure exploration.