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He believed that everything was made up of atoms
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He believed that all of the elements combined such as (earth, water,fire,air)
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He made the first scientific classification of minerals
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He discovered that elements can be broken down into 2 substances.
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Developed the law of conservation of mass and he also named hydrogen and oxygen.
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Developed the law of definite proportions
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elements are consist of atoms that have the same mass. The compounds were different elements combined together
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He made the law of combining volumes
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Developed Avogadro's law
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Discovered the first subatomic particle which is the electron
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He discovered that there is invisible radiation that is emitted by uranium
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He found that a electron has a negative charge
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Made the Bohr model of a atom
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Found that the nucleus was surrounded by electrons
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Founder of the quantum theory of energy
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Discovered a wave of nature electrons and says that all matter should have wave properties
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founder of the theory of quantum mechanics
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Made the quantum mechanical model of a atom
