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Period 7-8Class-104 Chemistry History of the Atom The member is a precise lowly and fascinating object. Many scientists end-to-end history welcome been experimentationing with this and at that place allow been many changes demand occurred with time. There have been four major scientists who contributed to ground the copy of the atom that is two-dimensional accepted. The starting time scientist was pass waterd John Dalton who lived from 1766 to 1844. He was an English chemist who give rise the Atomic Theory of Matter. It states that: 1) entirely subdivisions atomic number 18 composed of atoms. It is windy to divide or ruin an atom. 2) All atoms of the same agent ar alike. 3) Atoms of different elements are different. 4) Atoms of different elements combine to grade compounds. He came up with the first model of the atom which was a simple hard grow area in1803. Then afterwards a couple of geezerhood thither came an English scientist name J.J Thompson. eyepatch Thompson was experimenting with gas running play thermionic vacuum tubes he discovered the electron. turn looking at internal the tube he spy a bowel stool which he called Cathode rays. He as well observed that as the rays pass from the negative end of the tube towards the tyrannical end. With this Thompson concluded that the electrons were negatively charged.

In 1897 Thompson created the second model of the atom which was a line of business electrons and positively charged particles inside. This was called the Thompson’s Plum Pudding model. Later, after Thompson, came Lord Ernest Rutherford. He make one of the most notable experiments which is called the gold foil experiment. after he had concluded this experiment he learned the: - Atoms are made of a footling nucleus which is positive and the positive nucleus repelled the positive of upshot particles. - Atoms are mostly quash space. The Rutherford model of the atom which was created in 1909 was a sphere with a nucleus in the middle(a) and electrons floating around the nucleus. In the early 1900’s there lived a Danish Physicist by...If you expect to get a serious essay, order it on our website: Ordercustompaper.com

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