Atomic History Booklet
Published on Nov 18, 2015
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PRESENTATION OUTLINE
Democritus atomic theory
He started off with a sphere as his model and then he came up with the theory saying that atoms are indivisible particles and he also was the first who called it the atoms
Philosopher that saw a detailed view of "atomos" & indivisible particles which make up matter found out in 400 B.C
Photo by jean louis mazieres
John Daltons' theory
He concluded many things in 1808,the "indivisible particles" were atoms and elements, which some were the same and some were different. New elements couldn't be made or destroyed. Also, different elements could of joined together with whole numbers to form compounds. He tested this out a lot of times with gases in the atmosphere.
Photo by Bolckow
JJ Thomsons theory
He discovered the electrons by using plum pudding. He used the plums as electrons and the pudding as the positively charged part. He also invented the cathode ray tube in 1897.
Photo by Science Museum London
Ernest Rutherfords theory
He discovered that the nucleus with the conclusion of the atom being made up of mostly empty space. The nucleus is a positive charged region in the center of an atom. He used the gold foil experiment in 1910.
Photo by Diane10981
