A t o m T i m e l i n e

B y : M a r i n a S p a g n o l o

John Dalton 18 03 :

Dalton’s atomic theory came in 4 different parts.


1) All matter is made up of atoms, atoms are indivisible and they are indestructible.

2) All atoms of an element are identical in mass and properties.

3) Compounds are created by a combination of two or more different kinds of atoms.

4) A chemical reaction is a “rearrangement” of atoms.

J. J Thompson 18 97 :

Thomson proved that Cathode Rays were made up of previously unknown negative charged particles of which he stated were smaller than atoms.

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Hantaro Nagoaka 19 04 :

Of which put forth an idea that there was a substitute planetary model of an atom in which a positively charged center is surrounded by revolving electrons.

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Ernest Rutherford 19 11 :

He of all accredited that atoms have their charge concentrated in their nucleuses, this of which and other things made him the Father of Nuclear Physics.

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Niels Bohr 19 13 :

    He was a Danish physicist who put forth the idea hydrogen model and who made foundational contributions to understanding atomic structure and quantum theory,he received the Nobel Prize in Physics in 1922.

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Louis de Broglie 19 24 :

    French physicist who made contributions to quantum theory, in his 1924 he postulated the wave nature of electrons and suggested that all matter has wave properties.




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Erwin Shcrodinger 19 26 :

He combined equation for the behavior of the waves with the equation of Brogile and came out with the theory of the distribution of electrons.
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James Chadwick 19 32 :

English physicist who was given the discovery of the neutron in 1932.
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