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what is John Dalton theoty. |
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Answer» Failure of Dalton’s Atomic Theory The postulates of the atomic theory by John Dalton •\tThe matter is made up of tiny particles called Atoms that cannot be divided. •\tAtoms are never formed or destroyed during a chemical reaction. •\tAtoms of an element exhibit same nature. They have the same size, mass, and character. •\tAtoms of different elements exhibit variant nature. They do not have same characteristics. •\tAtoms form compounds by combining in a ratio of whole numbers. •\tA compound contains a constant number and kinds of atoms Dalton suggested that atoms can neither be created nor destroyed and are indivisible. But the discovery of electrons and protons in atoms lead to failure of this aspect of Dalton’s theory. The postulates of this theory may be stated as follows:\tMatters are composed of very tiny particles called atoms.\tThese particles are too small to see and cannot be created or destroyed in a chemical reaction.\tAtoms of a specified element are identical in mass and chemical properties.\tAtoms of different elements have different masses and chemical properties.\tAtoms combine in the ratio of small whole numbers to form compounds.\tThe relative number and kinds of atoms are constant in a given compound. John Dalton\'s atomic theory says tht all things in the universe whether an element or a compound or a mixture is made up of an unknown seen form of matter that is the atom . Atom is the smallest particle of matter. It is the basic unit of all. It is indivisible and thus cannot be divided |
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