Thomson's Theory Of Rutherford Theory

Joseph John Thomson

Thomson demonstrated that atoms have charged particles in them by introducing a sample of gas into a region between two charged plates. He observed a current flow. This suggests that the atoms have been broken into charged particles. A heated cathode then caused the atoms of the sample to ionize. These were known as cathode rays. Thomson tried to prove that the cathode rays were a stream of negatively charged particles called electrons.

Ernest Rutherford

Rutherford showed that the atom had a little and heavy nucleus. He designed the experiment to use alpha particles that are emitted. If Thomson's findings were correct, then the beam would go through the gold foil but some of the beams were reflected. Rutherford made his

The majority of Thomson's calculations were about rings with less than seven charges. The motion of each charge was controlled only by its electrostatic attraction toward the centre of the sphere, and by the repulsion from the other negative charges. His model was called the plum pudding model of the atom for its resemblance to the British plum pudding. But the Thomson model was later disproved by the gold foil experiment performed by Ernest Rutherford, it suggested that there is a small 'nucleus' of the atom that has a high positive charge. His discovery led him to come up with the Rutherford model of the

These days, almost everyone has had an x-ray at least once in their life. X-rays are used to find breaks and fractures in the bones and this is a very important part of the healing process as the doctors can then target the exact area of the break. Without Goldstein's experiments with the cathode rays, we may have not of had x-rays today. Goldstein had developed the cathode ray greatly with his experiments. This lead to German Physicist, W.C Roentgen, discovering x-rays. Roentgen was working with the cathode ray tube in his laboratory. He took out all of the air from the tube, filled it with a special gas, and passed an electric voltage through it. When he did this, the tube would glow. Roentgen covered the tube with black paper and found that a green coloured light could be seen coming from a screen that was a few feet away from the tube. He realized that he had discovered an unknown ray which was coming from the tube, a ray that could pass through the black paper. When he conducted more experiments he also found that the unknown ray would pass through most things, casting shadows of objects on pieces of film. He named the ray X-ray, because 'X' means unknown quantity. W.C Roentgen later died on the 10th of February 1923 from carcinoma of the intestine due to his