Atomic Theory Research Paper

1651 Words 7 Pages
Development of the atomic theory throughout history


This paper will explain many concepts of the atomic theory. It will also include very important information that involves 15 scientists and their contributions to the atomic theory. There are many different models that scientists constructed, that they believed atoms looked like. There are only 5 atomic models that have ever been accepted. Our perspective on the atom has changed throughout the years because of new consistent evidence discovered by scientific experiments. This paper will include the all 15 key scientists and experiences that were associated with the development of the modern atomic structure. The atomic
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His contributions came along around 1898. Throughout his lifetime, he constantly studied the radiations that were being emitted from the elements Uranium and Thorium, which he named. Rutherford discovered the counterpart of the electron. He discovered a positively charged subatomic particle known as the proton. Ernest was the first of the scientists to reference or hypothesize of a neutrally charged particle located in the atom. Rutherford 's nuclear atom (Rutherford 's atomic model), describes an atom to be a very small, dense, positive core called a nucleus.

Max Planck contributed in the year 1900, only two years after Rutherford’s first contribution. Planck used the notion of hidden units of energy in order to explain matter that was so hot it was glowing. He also was extremely helpful in explaining certain processes that subatomic particles go through.

Albert Einstein is one of the most if not the most widely known contributors of the atomic theory. In 1905, Einstein released a theory that is now known as the Theory of Relativity. In the beginning however, many people simply disregarded this theory as being unuseful. Some believed that this theory demonstrated nothing more than a few tweaks to the Newtonian Gravitation
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Rutherford overturned Thompson’s Plum Pudding Model. He again used the gold foil experiment. This time, the alpha particles fired almost directly back at him. After many hours of contemplating “He reasoned that the only way the alpha particles could be deflected backwards was if most of the mass in an atom was concentrated in the nucleus.” Profesor N. De Leon. He then developed a new model of the atom which placed all the protons in the nucleus and all of the electrons around the outside of the nucleus. This model is known as the Planetary Model of the Atom because it very closely models the sun with planets orbiting around

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