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Image CitationCitationIt is a branch of Alchemy devoted to extending life.
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Image Citation[Citation](Torricelli, Evangelista (1643)Invented the mercury barometer. )
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[Citation](Dalton, John (1766-1844)Proposed atomic theory based upon measurable masses )
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CitationHe described the atom as having a positive nucleus surrounded by negative orbiting electrons. This model suggested that most of the mass of the atom was contained in the nucleus
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Image CitationCitationBohr's model suggested that electrons orbited around the nucleus and greatly determined an atoms chemical properties. He also assumed that electrons traveled in stationary orbits defined by their angular momentum from the quantum theory.
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Image CitationCitationHe discoved electrons and determined that all mater contained them.