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460 BC - 370 BC

Took a seashell and broke it in half until it was powder

Remembered for his formulation on an atomic theory of the universe

Discovered the atom

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1766 - 1844

Experimented on a bunch of different gasses

First atomic theory to describe all matter in forms of atoms

Discovered that the  pressure of a mixture of gases was rhe same  to the sum of the partial pressures that each individual gas showed while taking up a space

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1834 - 1907

Experimented making a system of elements classified by atomic weight and mass

First person to realize you can classify elements by their atomic weight

Discovered the periodic table

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1856 - 1940

Experimented with cathode ray tubes, and proved that all atoms contain some negatively charged particles

Proposed the plum pudding model of the atom

Discovered electrons

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1871 - 1937

Gold Foil experiment to discover more about whats inside atoms

Wanted to see what the inside of a particle

Doscovered that most of an atom is an empty space surrounding a tiny nucleus

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1885 - 1962

Experimented with electric discharges at certain discrete charges

Proposed that hydrogen atoms’ energy only transfer in well defined quantities

Discovered that a light quantum is emitted when atoms orbit others

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1887 - 1961

Experimented hevaily on his cat with vials of acid

Showed that the qauntization of the hydrogen atoms energy levels could be calculated from his equation

Discovered the Schrodinger Equation

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1901 - 1976

Conducted an experiement to try and measure the position of an electron

Proposed a formula of quantum mechanics

Discovered the uncertainty principle