What ar atoms? Atoms are the building blocks which ramp up up everything in the universe except for energy. The idea of atoms has previously been suggested since 400 BC in Greece by the man, k straightawayn as Democritus. This suggests that scientists back then knew the existence of atoms, but could not excavate it. Even today it is not can visually contingent even with the most advanced technology today to get out atoms. Scientists however can prove the existence of atoms through experiments. straightaway we know that atoms are made up of sub nuclear particles, a nucleus containing nucleons (positive charged protons and neutral charged neutrons) which are negatively charged electrons particles which rescue a mass 1/2000 of a proton. But the question is how the idea of atoms refined into what we now know today.
First, we must look back into 1911 where Ernest Rutherford and his two students: Hans Geiger and Ernest Marsden conducted the know experiment which leads to the planetary model of an atom. This experiment is known today as Rutherfords scattering, it involved shooting of import particles at a thin gold leaf, and patience.
An alpha depart cause a slight light flash on the screen so the experiment itself suggests how cruel it was for both Rutherfords students because they were responsible for counting the number of flashes which appeared. The expected results were that the alpha particles would just now be deflected slightly. The reason for this was because previously in 1904, JJ Thomson , the same scientist to have discovered the electron, had proposed the plum pud idea. The atomic structure suggested by Thomson was that electrons were floating in a sea of positive charge. However, although most alpha particles had been deflected slightly and most went straight through without deflection, 1 in 10000 had deflected right back which puzzled Rutherford. The totally way this was possible was that the atomic structure of plum pudding was incorrect. Rutherford...If you want to get a full essay, order it on our website: Ordercustompaper.com
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