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Main points of Dalton's atomic theory and limitations of Dalton's atomic theory

Answer 1

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⭐Main points of Dalton's atomic theory⤵

⏩Matter is made up of atoms which are extremely small particles and cannot be sub-divuded, or elements consist of minute, indivisible, indestructable particles called atoms.

⏩Atoms of an element are identical to each other. They have the same mass and size.

⏩Atoms of different elements differ in properties and have different mass and size.

⏩Compounds are formed when atoms of different elements combine with each other in simple numerical ratios such as one-to-one, one-to-two, two-to-three and so on.

⏩Atoms cannot be created, destroyed or transformed into atoms of other elements.

⏩The relative numbers and kinds of atoms are always the same in a given compound.

⭐Limitations of Dalton's atomic theory⤵

⏩It fails to explain the cause of chemical combination.

⏩It does not explain Gay-Lussac's law of combining gaseous volumes.

⏩It does not give an idea about isotopes and isobars.

⏩It fails to explain why atoms of different elements show different properties like mass, size, etc.

⏩It does not explain the difference between an atom and a molecule.

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