So, it showed that electrons moved in the straight direction. It showed that the shadow was disappeared as the cross was placed lower. Then, the maltase cross was placed in the lower position. When he put the maltese cross on the electrons’ path, the cross’s shadow can be seen on the wall of the tube which was on the opposite side of the cathode. JJ Thomson conducted this experiment using the maltese cross. Electrons travel in the straight path.Here’re some electrons properties from the JJ Thomson atomic experiments: He also included these properties to the atomic theory by JJ Thomson. This experiment was the first step of the JJ Thomson’s atomic theory.īased on J.J Thomson’s experiment, he could compose the properties of electrons. Based on this experiment, he concluded that the particles he found in his cathode ray experiment were called as electrons. That glowing light particles were smaller than the atom. JJ Thomson identified that the glowing light were the small particles. It also resulted that the glowing materials in the light bent to the positive charge plate. His experiment showed that the glowing light bent to the positive charge plate. One plate is the positive charge electric plate while another plate is the negative charge plate. He used the two electric plates on its path. At that time JJ Thomson conducted more experiments to find out this case using cathode tube method. However, they could not successfully find the reason to explain this condition. In this experiment, scientists could see the glowing light inside that vacuum tube. They did pass the electric current to the vacuum tube. This basic atomic theory triggered other scientists including JJ Thomson to perform experiment to explain the atomic structure model.Īs we mentioned previously, JJ Thomson performed some experiment in his laboratory to find out the true model of atom. In that period of time, some other scientists also conducted similar experiment using the cathode ray tube to understand the atom model. He believed that atomos have different shape and dimension. Democritus called this part as the atomos. Prior to Dalton’s atomic theory, the famous Greek philosopher, Democritus, discovered the very basic theory about atom. He created the theory from the concept of there should be the part of matter which is extremely small that we as a human can not see. There were multiples number ratios in various compounds like oxygen compound. Atoms may combine in more than one-all ratios in element reactions.Based on Dalton’s experiment, he concluded that the chemical reactions will occur based on atom to atom ratios Atoms combine in the small and whole-all rations in chemical reactions.While atoms in the different element will have the different characteristic from one to another. Every single atoms in oxygen is same to another. Dalton believed that all atoms in the same element must have same weights.
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