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https://goo.gl/7m2EQg

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(Image)https://goo.gl/BxTQro
(Citation)https://goo.gl/IDGjAx
It was hypothesized that electrons could only be at certain types of energy levels.Theses energy levels are now to be called orbit energy levels.So electrons can contain orbital levels.

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While studying the passage of an electric current through gas, negatively charged particles ( electrons) were produced. He called the electrons "corpuscles". Since there were negatively charged particles he thought there had to be positively charged ones as well.

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The main purpose of the model is to describe the different properties that are being associated with electrons in different atomic settings.Bohr also stated that the model of a small atom contained a small mostly positive charged nucleus which is then orbited by the different various amounts of negatively charged electrons.

(citation)https://goo.gl/EUZGp
(image)https://goo.gl/qghCkB

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He experimented with gases. All elements are composed of atoms. If the atoms are of the same element they are exactly alike.

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Believe in the earth, water, air, and fire nature in matter. Disagreed with Democritus's idea.

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(citation and Image)https://goo.gl/sTHA
All positive charges are found in the nucleus.All of the negative charges are found on the outside of the nucleus.Rutherford created the Gold Foil experiment which led to the anticipation of the Alpha particles bouncing back from the gold foil rather than entering straight through the foil.

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After searching for the description of matter he wanted to know if matter could be divided into smaller pieces forever, or if there was a limit. He named the smallest piece of matter " atomos" (not to be cut). Atoms were infinite in numbers.