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Atoms and Molecules NCERT Notes for CBSE Class 9th

Atoms and Molecules NCERT Notes for CBSE Class 9th

Atomic Theories Democritus (470-380 B.C.) [Father of Atomic Theory (early)] He proposed that matter could NOT be divided into smaller pieces forever. He claimed that matter was made of small, hard particles that he called “atomos” Antoine Lavoisier (father of modern chemistry) Laws of Chemical Combination Law of Conservation of Mass: The law of conservation of mass states that mass can neither be created nor destroyed in a chemical reactions, i.e., the total mass of the products is same as…

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