There are 5 postulates in Dalton's atomic theory.
1. All the matter is made up of atom, they are tiny and indivisible.
2. All atoms in an element posses same properties ,mass and size but different atom have different size and masses .
3. Atoms cannot be Sub-divided ,destroyed or can be created.
4. Compounds are formed when atoms of different elements merge with each other in a whole number ratio.
5. It can be rearranged, combined or separated by chemical reaction.
Dalton's atomic theory is on the nature of matter. He states that all matter is made up of atom and it is the smallest fundamental unit. it cannot be created or destroyed. it can be converted from one form to the other. its limitations are it does not talks about sub-atomic particles. It does not account isotopes and isobars.
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