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Question
State the various postulates of Dalton’s atomic theory of matter.
Solution
Postulates of Dalton's atomic theory of matter :
- Matter comprises very small particles called atoms.
- Atoms of different elements differ in mass, size and chemical properties.
- Atoms can neither be created nor destroyed.
- Chemical reactions involve the combination, separation or rearrangement of atoms to form molecules or compounds.
- Atoms cannot be divided.
- A compound has a fixed number and kind of atoms.
- Atoms of the same element can combine in more than one ratio to form more than one compound.
- All the atoms in an element are identical in every aspect i.e. they have same mass, size and chemical properties.
- Like elements, there are many kinds of atoms.
- Atoms of different elements join together to form molecules of the compound in a chemical combination.
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