dalton atomic theory

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DALTON’S ATOMIC THEORY”

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Page 1: Dalton Atomic Theory

“DALTON’S ATOMIC THEORY”

Page 2: Dalton Atomic Theory

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 theory, and his research into colour blindness

Page 3: Dalton Atomic Theory

WHAT IS DALTON’S ATOMIC THEORY?

A theoretical proof the validity of different laws was given by John

Delton in 1808,in the form of a model of an atom known as Dalton’s Atomic

Theory.

Page 4: Dalton Atomic Theory

POSTULATES OF DALTON'S ATOMIC THEORY

Page 5: Dalton Atomic Theory

I. POSTULATE

Matter is made up of extremely small particles called atoms.

Page 6: Dalton Atomic Theory

II. POSTULATE Atoms are indivisible particles, which can neither be created nor destroyed in an chemical reaction .

Page 7: Dalton Atomic Theory

III. POSTULATEAtoms of given element are identical in all respects of mass, shape, size, and chemical properties.

Page 8: Dalton Atomic Theory

IV. POSTULATE Atoms of different elements have different masses and chemical properties .

Page 9: Dalton Atomic Theory

V. POSTULATE Atoms of same or different elements combine together to form compounds.

Page 10: Dalton Atomic Theory

VI. POSTULATE•The relative number and kinds of atoms are constant in a given compound.

Page 11: Dalton Atomic Theory

DRAWBACKS OF DALTON'S

ATOMIC THEORY

Page 12: Dalton Atomic Theory

Page 12

• According to Dalton’s theory, atoms of same element have same mass but this

theory does not hold good in case of isotopes of an element.

I.DRAWBACK

Page 13: Dalton Atomic Theory

13

• According to Dalton’s theory, atoms of same element have same mass but this

theory does not hold good in case of isotopes of an element.

II.DRAWBACK

Page 14: Dalton Atomic Theory

Page 14

Allotropic forms of the same compound posses different

properties. For example, diamond, graphite and charcoal are all forms of carbon but their properties are different from one another which prove that all atoms of the same element are not identical in every

isobars.

III.DRAWBACK

Page 15: Dalton Atomic Theory

• According to Dalton’s atomic theory, the masses of different elements are different but theory does not hold good in case of isobars.

IV. DRAWBACK

Page 16: Dalton Atomic Theory

THANK YOU

THE END

Page 17: Dalton Atomic Theory

EFFORTS BY:

KARNIK SINGH

CLASS: IX-A ROLL NO-26