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Period: to
Atom Model
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Law of Conservation of Mass
This law was produced by Antoine Lavoisier it states that no matter can be ceated or destroyed and that for every chemical reaction to a substace there is an equal reaction with the opposing substance. -
Atomic Theory
Dalton combined work of Lavoisier and Democritus into one, single theory. This theory stated that all matter is made of indivisible and indestructible particles called atoms. -
Spherical Model
This model was made by John Dalton he described it as a soldid dense spherical particle that is indivisible they were called atoms. Each atom was said to be different for each different element. -
Law of Definite Proportions
The Law of Definite Proportions or Prousts Law states that a compound will always hold the same proportion of elements to mass. -
Plum Pudding Model
J. J. Thomson made the Plum Pudding model it is described as, evenly distributed positively charged protons with negative electrons moving around them around them -
Cathode Ray Tube
J.J. Thomson conducted this experiment with a cathode ray tube, and bent the path of the rays with magnets. He interpreted this as evidence of much smaller particles, which he called electrons. He later discovered they were negatively charged. -
Quantum Theory
Max Planck created the Quantum Thoery it is based on the principle that matter and energy have the properties of both particles and waves. -
Theory of relativity
Albert Einstein made the theory of relativity, which explains how to see motion between different frames of reference that is, places that are moving at constant speeds relative to each other. -
Nuclear Model
The model was made by Rutheford he described the atom as dense and positively charged core called a nucleus, where nearly all the mass is located, around which the light, negative particles, called electrons, circulate at some distance -
The Gold Foil Experiment
This experiment was preformed by Rutheford to prove the exsistance of th atom. THe results lead to the unexpected discoverey of the Nucleus.
(I was no able to find an exact date) -
Bohrs Model
Neils Bohr made this model, he proposed that electrons are in fixed energy levels he called orbits. The electrons would orbit around the nucleus. -
The Proton
Rutherford the Proton by using alpha rays he knew they always travel in straight lines. While doing an experiment they became fuzzy and blurred, and he concluded that they were doing that because they were hitting solid particles in the air. Those solid particles were protons. -
Th Uncertainty Principle
Heisenberg wrote the Uncertainty Principle saying that the more you know the location of a paticle the less you know the momentum. In vise versa the more momentum equals less of the known location. -
Quantum Mechanical Model
Schrodinger made this model from the Quantum Theory he proclaimed that you cannot predict the location and energy so theres only a relative area and charge. -
Nuetron
The nuetron was discovered by James Chadwick in 1932. Chadwick found it by its mass equal to a protons mass but with no charge.
