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Created a scientific theory, by studying different natural processes which is used by scientists today. The idea was that all metals were composed of sulfur and mercury in different proportions, -
Proposed matter was formed of different types of tiny desecrate particles and that the properties determine the properties of matter. -
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Theorized that solid forms of matter are composed of indivisible elements shaped like triangles. -
Known as the "father of modern chemistry", he discovered the relation between pressure and volume which showed that matter is made of tiny particles called atoms. -
Defined elements as chemicals that can't be broken down into other substances through chemical analysis. -
He created the atomic theory and said that elements consist of particles, and all atoms are identical and can't be destroyed. -
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Created a principle that states that equal volumes of gases at the same temp and pressure contain the same number of molecules regardless of the physical and chemical nature -
Came up with a law that states that elements are arranged according to the value of their atomic weights. He also created the periodic table. -
Discovered that atoms were made up of smaller components. -
Discovered the strongly radioactive elements polonium and radium. Also that these elements were tiny particles from atoms -
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Proved the existence of atoms and molecules mathematically. He figured this out by the movement of liquid caused by Brownian motion. -
Succeeded in determining the magnitude of the electrons charge by using an oil drop expirament. -
Established that the mass of the atoms is concentrated in the nucleus, he describes the atoms having a tiny dense and positively charged core. -
Created a model of an atom, which protons and neutrons. The model suggests the electrons orbit the nucleus at fixed energy levels. -
Published a paper where he concluded that the atomic number is the number of positive charges in an atomic nucleus -
Created a type of quantum mechanics based on matrices which was the quantum theory. -
Theorized that the behavior of electrons within atoms could be explained by treating them mathematically. -
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Found that atoms consisted of protons and electrons, and another subatomic particle called a neutron.