Tjis essay explains the evolution of the atomic theory and how it has changed over the last cenutry or so.

The atomic scheme has changed much since John Daltons time. In the of late cardinal hundreds John Dalton first discover that elements combine in specific proportions because they atomic number 18 do of man-to-man atoms. For example, hydrogen and chlorine always combine in a specific proportion to create hydrochloric acid. Dalton thought that atoms were excellent particles, alike(p) a small marble. Daltons atomic possible action consisted of tierce parts. They were: *All sum totals are made of atoms. Atoms are small particles that groundworknot be created, divided, or destroyed. *Atoms of the same substance are exactly alike, atoms of different atoms are different. *Atoms join with separate atoms of other substances to provoke sweet substances. Daltons system was proved wrong when new teaching was discovered and Daltons theory could not explain it. The atomic theory has evolved. In 1897, a scientist named J.J. Thompson found and identified a riddle in Daltons the ory. He discovered that there were particles inside(a) the atom. So, Thompson said, atoms can be divided into even smaller parts. The particles that were found inside the atom had a negative force. The negatively super charged particles were called electrons. Scientists had already found out that atoms had no overall charge. Thompson didnt hunch forward the location of the dictatorially charged material so he made a theory that the negatively charged electrons were introduce in the atom which was made of overall positive matter. Thompsons moulding was called the plum-pudding model. The electrons looked like plums that were in the pudding . In 1909, a festive named Ernest Rutheford, a former(prenominal) student of Thompson wishinged to investigate his former teachers theory. He aimed a small beam of radium particles at a punctuate end of thin gold foil. He thought if atoms were plainly fragile blobs embedded with electrons like Thompson had suggested then the beam o f... ! Your test was decent; however, it left much to be desired. You could begin by decision common threads that strongly link the theories together, and providing well-nigh information on how the find was made along with scientific / numerical reasoning. In addition, your conclusion left the whole outlet coarse; whereas, it should have summed up your essay, without leaving questions about the motion itself dangling there. Though it should produce a desire to examine much about the topic within the reader, it should not turn over questions that do no merit (ie. how close are they to discovery?). If you want to get a full essay, order it on our website: OrderCustomPaper.com

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