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It is an ancient practice. They believed that all metals are made up of mercury and sulfur.
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He stated:
Matter is made of invisible particles called atoms.
Atoms are indestructible and unchangeable.
Atoms are homogenous and they don’t have an internal structure.
All atoms have different sizes and shapes. -
Worked with Democritus. Created the idea that everything is composed of various indivisible things known as an atom.
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He believed that everything was made up of four elements; fire, water, earth, and air. He said that a mass of an incomprehensible size was everywhere. He also believed that there were no different particles for each element.
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His idea study poison helped chemistry get introduced into the world of medicine. He helped bring the use of chemicals and minerals into medicine.
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He made the first classification of minerals based on their physical properties.
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He believed that the elements are made up of atoms that are of different sizes that group up to make different substances.
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He created the idea of the Law of Conservation. His idea stated that matter can not be created or destroyed
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Created the idea of the Law of Definite Proportions. This idea states a compound always the same elements in the same proportion of mass.
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He discovered that equal volume of gas with the same temperature and pressure are equal in volume.
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He studied the properties of gases. He created the Law of Combining Volume of Gas. He stated that equal volume of all gases expand equally with the same increase in temperature.
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He stated that matter is composed of atoms. All atoms are the same in size and indestructible. He believes that different elements differed in mass. Dalton's atom was similar to a billard's ball. Created the idea of the Law of Multiple Proportions.
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He introduced the chemical system of chemical symbols. He started the idea of the periodic table.
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He created the cathode ray tube which was used for television. His student was JJ Thomson.
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He used the Cathode Ray Tube for experiments. When he put a magnet near the beam it moved away. This experiment led up to the discovery of the electron.
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He discovered the evidence of radioactivity.
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He determined the charge of an electron through his Oil Drop experiment. In his experiment, he took two magnetic plates that would suspend the electrons between the plates.
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He discovered alpha particles. His experiment called the Gold Foil experiment showed that the nucleus contains protons.
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He discovered the energy quanta.
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He discovered the structure of an atom.
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Studied the electron and discovered the properties of matter.
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He was a pioneer in the quantum mechanics field.
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He discovered dark matter, which is something that makes up 30% of the universe.
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He discovered the existence of the neutron.
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He created the idea of the Quarks theory. Quark is the idea of combining composite particles called hadrons.
