Atomic Timeline

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by bmtteach
Last updated 5 years ago

Discipline:
Science
Subject:
Chemistry
Grade:
10

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Atomic Timeline

Gold-foil investigations into the scattering of alpha rays and the nature of the inner structure of the atom which caused such scattering led to the postulation of his concept of the "nucleus"

Umm plum pudding

When the Atomic Theory was discovered, Aristotle did not believe in it. He believed that all substances were made of Fire, Water, Air, and Earth.

Discovered electrons and noticed that an atom can be divided. Also, he concluded atoms are made of positive cores and negatively charged particles within it.

Atomic Timeline

Nucleus lies in the center of the model and is made up of a certain number of protons and neutrons. Each of the outer layers is made up of a certain amount of electrons.

400BC

350BC

1803

1897

1909

1913

All matter consists of invisible particles called atoms. Atoms are i indestructible, solid invisible particles.

An element is one of a kind (aka pure) because all atoms of an element are identical.

Democritus

Aristotle

John Dalton

J.J. Thomson

Ernest Rutherford

Neils Bohr


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