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By breaking down the chemical composition of the 4 basic elements of its period.
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Introduced the atomic theory in which atoms are broken down mathematically
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Theorized that everything is made of small atoms
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Believed that all materials on earth aren't made of all atoms, but elements.
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He helped develop a new definition of an element. Which was any substance that can be broken into 2 or more substances is not an element
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Found that mass is conserved in a chemical reaction. Atoms aren't created or destroyed
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His theory was the first complete attempt to describe all matter and its properties
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He discovered that all known chemical elements were arranged in order of increasing atomic weight. Resulting the table is dis played with a pattern.
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Discovered that all atoms contain tiny negatively charged electrons. (His method was the plum pudding method)
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Conducted own experiments on rays. The ray was theorized and came from an atomic structure
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He proud existence of atoms. And revolutionized all science through the use of atoms
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His success was the determination of the charge carried by an electron.
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Kept studies of radioactivity and the atom. And he discovered empty space in the atom, with concentrated mass in a central positively charged nucleus.
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Proposed a theory for the hydrogen atom based on quantum theory. That energy transferred electron. Which move around the nucleus only in prescribed orbits
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Proved that every element identity uniquely determined by the number of protons it has.
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formulated mechanics for certain principles for the atom
