---Topic Dalton atomic Theory--- Class 9th students' pptx.

2. Introduction About John Dalton
John Dalton was born on September 6, 1766, in
Eagles field, England, UK.
NAME – John Dalton
OCCUPATION - Scientist, Chemist, Meteorologist
BIRTH DATE - September 6, 1766
DEATH DATE - July 26, 1844
EDUCATION - john Fletcher's Quaker grammar
school
PLACE OF BIRTH - Eaglesfield, United Kingdom
PLACE OF DEATH - Manchester, United Kingdom

3. Dalton's atomic theory proposed that all matter
was composed of atoms, indivisible and
indestructible building blocks. While all atoms of
an element were identical, different elements
had atoms of different
size and mass.

4. Dalton’s Atomic Theory
According to Dalton’s Atomic Theory , all matter
whether an element ,a compound , or a mixture is
composed of small particles called atoms. The postulates
of this theory may be stated as follows:

5. iii. Atoms of a given element are Identical in
mass and Chemical properties .
iv. Atoms of different elements have different
masses and chemical properties.
v. Atoms combine in the ratio of small whole
Numbers to form compounds.

6. vi. The relative number and kinds of
atoms are constant in a given compound.
Symbols for some elements as proposed
by daltons :

8. Drawbacks of Dalton's Atomic Theory of
Matter. It was proved that an atom is not
indivisible. As an atom can be subdivided
into electrons, protons and neutrons. ...
According to Dalton Atomic
Theory,atoms of an element are identical
in mass, size and many other chemical or
physical properties.