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Atoms

John Dalton was an English chemist and physicist in the early 1800s known for pioneering work developing atomic theory. Through observing chemical reactions, Dalton built on earlier ideas of atoms as fundamental units, proposing that all matter is made of tiny spheres called atoms and that different types of atoms exist. He suggested atoms of different elements could combine to form compounds while retaining their identities, laying the foundation for modern atomic theory.

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53 views7 pages

Atoms

John Dalton was an English chemist and physicist in the early 1800s known for pioneering work developing atomic theory. Through observing chemical reactions, Dalton built on earlier ideas of atoms as fundamental units, proposing that all matter is made of tiny spheres called atoms and that different types of atoms exist. He suggested atoms of different elements could combine to form compounds while retaining their identities, laying the foundation for modern atomic theory.

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Shiro Chan
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JOHN DALTON

(1808)

 JOHN DALTON was an


English chemist, meteorologist and physi
cist. He is best known for his pioneering
work in the development of
modern atomic theory, and his research
into colour blindness (sometimes
referred to as Daltonism, in his honour).
 He suggested that all matter was made
up of tiny spheres that were able to
bounce around with perfect elasticity
and called them ATOM.

JOHM DALTON’S MODEL


 Dalton spent a lot of time in
his lab observing various
chemical reactions. By looking
at how things reacted and
recombined to form new
substances, Dalton was able
to build on Democritus' idea of
atoms as the fundamental
building block's of matter and
go further to say that there
were many different "flavors"
or kinds of atoms.
JOSEPH JOHN THOMSON
(1897)

PLUM PUDDING MODEL


ERNEST RUTHERFORD
(1911-1913)
NEIL BOHR
(1913)
ERWIN SCHRODINGER

THE CLOUD MODEL


JAMES CHADWICK

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