Atom History Essay

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Atom History Essay An Atom is a basic unit of matter that consists of a dense, central nucleus surrounded by a cloud of negatively charged electrons. The Atom was theorized by a man named Democritus of Abdera, Thrace in between c.a 460 BC - ca. 370 B.C. Atom is derived from the Greek word “atomos” , which means to be uncuttable. He had a theory that everything is composed of “atoms”, which he believed that these minuscule objects are indivisible, indestructible and have and always been in motion, had a void that exists between atoms, they are solid, homogeneous, and differ in size, shape, mass, position, arrangement, etc. Democritus identified all of these qualities by using the analogies from our sense experiences.
In the early 1800
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J.” Thomson, OM, FRS of Great Britain received the 1906 Nobel Prize in Physics for his discovery of the electron and for The Thomson’s atomic model. He assumed that the body of an atom is a spherical object containing N electrons confined in homogeneous jellylike but relatively massive positive charge distribution whose total charge cancels that of the N electrons. It was sometimes nicknamed as plum pudding model, because of its features as you can see below.

Next great physicist that would step up to the plate and take over world of Atoms, was The 1st Baron Rutherford of Nelson, also known as Ernest Rutherford OM, FRS. He was also awarded with a Nobel Prize in Chemistry in 1908, just like Thomson did a couple decades ago, for his investigations of the elements and discovery of the chemistry of radioactive substances. He proposed a model in which the electric charge +Ze in an atom is not distributed over the whole area of the atom but concentrates in a small area. Rutherford’s atomic model is most likely called the Rutherford model or simply Rutherford model of the nuclear atom. It is to be seen to have a black big ball at the center as the nucleus and small red points moving around the nucleus are electrons as seen below.

In a long line of the Bohr Family line as great physicists the most exemplary member in the authors opinion is Mr. Niels Bohr of Denmark. He took great advice from both great past
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