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The Rutherford Atomic Model
Transcript of The Rutherford Atomic Model
The Rutherford Atomic Model
7th December 2013
Ernest Rutherford is a New Zealander who was known throughout his life for his non-stop pursuit of scientific knowledge through hard evidence.
His modest upbringing gave him a good outlook towards science, as he realized it was the best contribution to helping the entire world.
He attended five separate colleges and used these combined educational experiences to begin work under J.J. Thomson, and beginning his scientific studies.
History of Influences
J.J. Thomson: Worked and supervised Rutherford as they worked with electrons and gasses, he gave Rutherford the idea of an atomic model with his plum pudding model.
Madame Curie: She studied radiation and discovered its origins, influencing Rutherford to classify radiation and use it in his experiments.
Geiger and Mardsen: Students under Rutherford that checked and confirmed the results of the gold-foil experiment, they used the experimental findings to make the Geiger Counter.
First Study into Radiation
Background- Madame Curie, started true research into radioactivity and discovered that most elements have radioactive isotopes.
An atom is mostly empty space, 99.999999%
The most mass of an atom is held in the nucleus, a cluster of positive particles in the center of the atom.
The nucleus is made up of protons that make the electron charge neutral, and an unclassifiable neutral particle to add stability.
Electrons are separate from the nucleus and rotate in orbits equidistant held in place by gravity and magnetism.
Discovery-Rutherford managed to classify alpha and beta particles, and discovered a new method for discovering elements.
Experiment: Rutherford put two strong magnets next to a source of radiation, and he classified the radiation according to charge.
Background:Rutherford used the alpha particles to shoot a gold atom and determine the location of positive particles.
Experiment: A radioactive element was placed in front of gold-foil and a detector screen, where the alpha particles could pass through, and Rutherford could see where they went.
Electrons actually do not rotate in orbits around the nucleus, and instead are in clouds, why didn't Rutherford discover this?
Rutherford only experimented with small elements, leading to flaws in his hypothesis about electron energy levels?
Why was Rutherford only able to classify alpha and beta particles, when we now know that there are gamma rays?
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Ernest Rutherford's atomic theory is the basis for all of our ideas about atoms today.
Accompanying his discoveries of the true atomic structure, he also made numerous other discoveries of methods still used by scientists today.
All of Rutherford's theories about atomic theory and radioactivity have been correct and are still used by modern scientists in element analysis.
Any of his ideas that are disputed just come from a lack of his deeper investigation by the people of his time period. He simply did not have the technology that modern chemists had...
...he still was leaps and bonds ahead of the technology of his time.