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Matter is made up of atoms that are indivisible and indestructible.

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realized that the accepted model of an atom did not account for negatively or positively charged particles. Therefore, he proposed a model of the atom which he likened to plum pudding.

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designed an experiment to use the alpha particles emitted by a radioactive element as probes to the unseen world of atomic structure.

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proposed a theory for the hydrogen atom based on quantum theory that energy is transferred only in certain well defined quantities. Electrons should move around the nucleus but only in prescribed orbits. When jumping from one orbit to another with lower energy, a light quantum is emitted.

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According to quantum thoery it's impossible to know the exact position and momentum of an electron at the same time

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discovered the electron by experimenting with a Crookes, or cathode ray, tube.

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overturned Thomson's model in 1911 with his well-known gold foil experiment in which he demonstrated that the atom has a tiny and heavy nucleus.

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n/a

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Schrödinger used mathematical equations to describe the likelihood of finding an electron in a certain position

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The indivisibility of an atom was proved wrong an atom can be further subdivided into protons neutrons and electrons However an atom is the smallest particle that takes part in chemical reactions According to dalton the atoms of same element are similar in all respects.

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J.J. Thomson was wrong because he thought that the positive charge of an atom was all one uniform blob of matter with the electrons moving in orbits inside the nucleus.

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The main problem with Rutherford's model was that he could not explain why negatively charged electrons remain in orbit, when they should instantly fall into the positively charged nucleus.

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model does not account for the fact that the lines in the hydrogen spectrum have different intensities. It fails to explain the spectra of atoms or ions having more than one electron

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probably, we dont know yet

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plum pudding

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rotherfords model

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quantized shell

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new and improved