Dalton Atomic Theory

John Dalton was an English chemist, physicist, and meteorologist.

He is best known for introducing the Atomic theory into chemistry, and for his research into colour blindness, sometimes referred to as Daltonism in his honour. Dalton's atomic theory was the first complete attempt to describe all matter in terms of atoms and their properties. Dalton based his theory on the law of conservation of mass and the law of constant composition.
Theory :-

• All the matter is made up of very tiny particles called atoms which looks like a hard solid ball.
• All the items of same element are identical in size mass and chemical properties.
• Chemical reactions only involved the rearrangement of atoms. atoms are not created or destroyed during chemical reactions.
• Atoms of one element are different from the atoms of all other elements.
• Compounds of different elements are formed when atoms of different elements combine in a fixed ratio.
• atoms cannot be divided and it neither be created nor be destroyed.

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