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प्रश्न
State the main postulates of Dalton’s atomic theory.
उत्तर
Dalton’s Atomic Theory:
The main postulates of a theory are:
- Matter consists of small indivisible particles called – atoms i.e. Atom is the basic unit of matter.
- Atoms of the same element are – alike in all respects i.e. atoms of hydrogen have the same properties as mass, density, and atoms of oxygen are alike in all respects.
- Atoms of different elements are different from each other. i.e. atoms of hydrogen are different from atoms of oxygen.
- Atom can neither be created nor destroyed.
- Atoms combine with other atoms in simple whole-number ratio forming compounds or molecules.
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Explain the Atomic number with example.
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