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He proposed a model of the atom that said matter is made of tiny, hard, indestrutable particles called atoms
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He recognized and named oxygen and hydrogen. He also showed the role oxygen plays in combustion. Also wrote the first extensive list of elements and predicted the exsistence of silicon
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He came up with Daltons Atomic Theory proposing all matter is made up of atoms and that atoms cant be destroyed of divided into smaller particles.
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Created by John Dalton to differenciate elements and compounds
-All matter is made up of samll particles
-atoms cannot be created, destroyed, or divided
-all atoms of the same element are identical in mass and size -
He created his own version of the periodic table of elements and used it to discover new elements and correct some of the previously disacoverd elements
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He showed that rays emitted from negatively charged cathodes were made up of negatively charged particles that came from inside atoms, known as electrons. The first sub atomic particles discoverewd
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Used by Joseph John Thomson to discover electrons. The tube emitted rays of negatively charged cathodes which were made up of negatively charged particles which showed us electrons
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A physist who developed many results in the field of quantum theory.
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Created by J.J. Thomson as his own version of the atom. Electrons scattered about that are surrounded by a positive mass.
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Ernest Rutherfords model of the atom proposed that the nucleus is found at the center surrounded by prottrons and neutrons while electrons orbit aroubnd it
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He conducted the gold foil experiment and also proped his own version of the atom
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Was used by Ernest Rutherford to discover the nucleus of an atom. He shot positively charged particles at a piece of gold foil and noted that some of the particles were bouncing back towards him. Coming to a conclusion that there was an extremely dense nucleus inside
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One of two models used today. The theory is based on mechanics and is used to explain sights made on complex atoms. The model uses complex shapes.
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He came up with an anwser as to why negatively charged electrons dont collide with the positively charged nucleus. He explained how the electrons were only able to occupy the energy levels
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He justified physical laws and the concept of the atomic number. He also developed Moseleys law by sorting chemical elements of the periodic table in a sensable order
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A model created by Niels Bohr to show why negatively charged electrons dont collide with the positively charged nucleus. SHowing that there are different energy levels within the atom
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He was a physist honoured for his works for the measurement of the elemetary electronic charge and his contribution toward the photoelectric effect.
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The electron cloud describes how electrons rotate around the nucleus of a atom. This was developed by Erwin Schrodinger and Werner Heisenberg
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He was the first person to show experimentally that there was a neutrally charged particle also present in the necleus which is called the neutron.
