The first Atomic model was formulated by?
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Answer: A. John Dalton
Explanation
John Dalton proposed the first scientific atomic theory in the early nineteenth century. He suggested that elements consist of identical indivisible atoms with unique masses. His model laid the foundational groundwork for modern chemistry and stoichiometry calculations. Dalton atomic theory proposed that chemical reactions rearrange atoms without destroying them. Ancient Greek philosophers like Democritus debated atomism earlier, but Dalton provided scientific evidence. Subsequent discoveries by Thomson and Rutherford later refined Dalton solid sphere model.
Chemistry education introduces Dalton model to help students grasp the particulate nature of matter. Scientific history credits Dalton with transforming philosophical atomism into a testable theory. Industrial chemistry advanced rapidly once atomic weights and formulas became widely understood. E.Rutherford discovered the atomic nucleus later using alpha particle scattering experiments. De Broglie proposed wave-particle duality for matter in quantum mechanics decades afterward. D.I.Mendeleef developed the periodic table of elements to organize chemical properties systematically.
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