![]() ![]() Therefore, the relative numbers and kinds of atoms are constant in a given compound. Chemical compounds are formed by the combination of two or more same or different kinds of atoms in a ratio of a small whole number.Atoms present in different elements have different masses and chemical properties. ![]() All the atoms of a given element have identical atomic mass and chemical properties.Atoms are indivisible and indestructible particles that can neither be created nor destroyed in a chemical reaction.Every matter is made up of very small particles called atoms.Postulates of Dalton’s Atomic Theoryįor learning chemistry or physics, Dalton’s atomic theory or model is based on the following postulates or assumptions, Therefore, the modern structure investigated by electronic configuration and atomic spectrum is different from Dalton’s atomic model. The most important factor in physics and chemistry for the determination of the structure has been given by the study of the electromagnetic spectrum emitted or absorbed by atoms. Today electrons hold the key to the chemical world−descibibe structure and chemical bonding of matter. Therefore, Dalton’s atomic theory no longer granted its position. The modern atomic structure clearly indicates an atom composed of subatomic elementary particles such as electrons, protons, and neutrons. According to Dalton’s theory, all matter (whether an element, a compound, or a mixture) is composed of small particles, called atoms. Dalton’s atomic theory provided an explanation for the law of conservation of mass and the law of definite proportions. ![]()
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