Dalton's Atomic Theory:

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Introduction:

In 1808, Dalton suggested the fundamental ideas of atomic theory which explains chemical nature of matter and existence of atoms. It is called as Dalton's Atomic Theory.

Postulates:

The main postulates are as;

1. All elements are made up of small indivisible particles called Atoms.
2. Compounds are formed when atoms of more than one element combine in simpler whole number ratio.
3. A chemical reaction is re-arrangement of atoms, but atoms themselves are not changed means atoms are neither created nor destroyed.
4. As time passed, new experimental facts led to modification of Dalton's atomic theory. i.e.
5. Atom is further composed of smaller particles called proton electron and neutron.

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