What did JJ Thomson’s cathode ray tube experiment show?

What did JJ Thomson’s cathode ray tube experiment show?

J.J. Thomson’s experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons. Thomson proposed the plum pudding model of the atom, which had negatively-charged electrons embedded within a positively-charged “soup.”

What did JJ Thomson’s cathode ray tube experiment show quizlet?

In 1897, J.J. Thomson’s cathode ray tube experiments provided the first evidence that atoms were composed of even smaller particles called electrons. The atomic theory states that all material substances are made of atoms and that each element has a unique atomic structure.

What did JJ Thomson conclude about cathode rays?

In 1897 he reported that “cathode rays” were actually negatively charged particles in motion; he argued that the charged particles weighed much less than the lightest atom and were in fact constituents of atoms [Thomson 1897a, 1897b].

What did the cathode ray experiment discover?

It was cathode ray tubes that allowed the English physicist J.J. Thomson to discover the existence of electrons in 1897.

What did Thomson’s experiment measure?

Thomson performed experiments to show that atoms consisted of sub atomic particles that had positive and negative charges. He determined that the negatively charged particles (electrons) were much lighter than the positively charged particles.

What was the conclusion of J.J. 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.

What did J.J. Thomson discover?

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.

What experiment did J.J. Thomson do quizlet?

Joseph John Thomson, or J.J. Thomson is the scientist that discovered electrons through an experiment called the Cathode Ray Experiment.

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 Thomson say the cathode rays are made up of?

Thomson showed that cathode rays were composed of a previously unknown negatively charged particle, which was later named the electron. Cathode-ray tubes (CRTs) use a focused beam of electrons deflected by electric or magnetic fields to render an image on a screen.

Why Thomson concluded that cathode rays were not made of atoms?

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. In short, Thomson had discovered the existence of particles smaller than atoms.

What did scientists conclude about the composition of a cathode ray?

These subatomic particles can be found within atoms of all elements. Conclusion – The cathode rays are made up of negatively charged particles known as electrons.

Why did Thomson result with cathode rays?

Why did Thomson’s results from experimenting with cathode rays cause a big change in scientific thought about atoms? His results gave the first evidence that atoms were made up of smaller particles.