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Atoms Beginning of Paper How many times can one cut a piece of gold in half? A Greek philosopher named Democritus was the first in a long line of scientists and mathematicians to try to answer this very difficult question. Around 450 BC, Democritus stated that all mater was composed of particles that he c .... Middle of Paper .... round and hard. This became the primary ambition for scientists after Dalton, to find out the structure of an atom. In 1897, Joseph John Thomson discovered electrons. Using a tube, magnets and charged plates, he sent ray particles through various experiments changing the position of the charged plates. By changing the plates, he discovered he could also change the point at which the particles would hit a florescent screen at the end of the tube. He decided that the ray was made up of particles with a negative charge. He named these pa .... 520 words | 2 pages Subscription Length Price Join 30 days membership (recurring) $19.95 90 days membership (recurring) $39.95 180 days membership (non-recurring) $69.95