What are the main postulates of Dalton’s Atomic Theory

What are the main postulates of Dalton’s Atomic Theory
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Ans : Dalton Atomic Theory :
(1) Composition :
 All elements are made up of small indivisible & indestructible particles called atoms.
(2) Identicalness :
All atoms of a given element are identical in all respects , having same size , mass & chemical properties. But the atoms of one element differ from the atoms of other elements.
(3) Formation of compounds :
Compounds are formed when atoms or more than one element combine in a simple whole number ratio.
(4) Chemical Change :
A chemical reaction is a rearrangement of atoms but atoms themselves are not changed this means that atoms are neither created nor destroyed in chemical reactions.
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