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Everything in the world is made out of particles surrounded by empty space. The particles varied in size and shape. Came up with the name atomos. (greek meaning indivisible)
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He thought that matter was composed of indivisible atoms that were in different shapes
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They thought all thing were made up of sulfur and mercury in various proportions. 500-1400 AD
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He stated that particles can combine to form new substance
(went against alchemy believed at the time) -
He proved the theory that everything was made out of 4 elements wrong and was the first person to discover elements
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He stated that common substances always broke down into the same elements. He concluded that those elements were made up of atoms which had different sizes and mass and could neither be created or destroyed
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This model was created by John Dalton -
He stated that equal amounts of gasses all at the same temperature and pressure have the same amounts of molecules
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He created a version of the periodic table and predicted elements that hadn't yet been discovered
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He discovered the electron (created the chocolate chip cookie model of the adom)
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They discovered radioactivity, radiation, and two new radioactive elements.
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This was created by J. J. Thompson -
He predicted the size of atoms using math and proved the existence of them
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He discovered the size of the electron (9.10 × 10 to the power of -28
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concluded that atoms are made up of mostly empty space with a few electrons while the rest of the atom was in the center which he called the nucleus
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He thought electrons orbited the nucleus. He also created the solar system model -
He discovered that the atomic number must equal the amount of protons
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this was created by Erwin Schrödinger -
discovered the neutron
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He created the wave equation