John Dalton was an English chemist and physicist best known for his pioneering work in developing atomic theory. In 1808, Dalton presented his atomic theory, which proposed that (1) matter is made up of extremely small indivisible particles called atoms, (2) atoms of a given element are identical in mass and properties, and (3) atoms of different elements can combine to form compounds with fixed ratios of the constituent atoms. Dalton's atomic theory provided an explanation for laws of conservation of mass and definite proportions in chemical reactions.

1. Introduction
C.a.r.e. public school
Dalton’s atomic theory
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SUBMITTED TO: RAJAT MITTAL SIR

2. Dalton’s atomic
theory

3. Who was Dalton
 JOHN DALTON FRS (6 September 1766 – 27 July
1844) was an English chemist, meteorologist and
physicist. He is best known for his pioneering work
in the Development of Modern Atomic.

4. What is Dalton’s atomic theory?
1.Dalton presented his atomic theory in 1808 which
was a turning point in the study of matter.
2.Dalton’s atomic theory provided an explanation for
the law of conservation of mass and the law of
definite proportions.

5. Postulates of Dalton's atomic theory
I. Matter is made up of extremely small particles called atoms.
II. Atoms are indivisible particles which can neither be created or
destroyed in a chemical reaction.
III. Atoms of given element are identical in all respects of mass, shape,
size and chemical properties.
IV. Atoms of different elements have different masses and chemical
properties.
V. Atoms of same or different elements combine together to form
compounds.
VI. The relative number and kinds of atoms are constant in a given
compound.