History of the atom

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Last updated 10:39 AM on 8/17/26
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7 Terms

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Partials in the nucleus

Protons(positive) and neutrons(neutral)

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Partials in the shells

Electrons(negative)

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John dalton

1805 - 1st idea that atoms exist as spheres

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JJ thompson

1897 - 2nd person. Discovered electrons.

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Ernest Rutherford

1909 - 3rd person. Discovered that mass and positive charge was concentrated and the electrons must orbit it.

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Nelson bhor

1914 - 4th person. Discovered that the atom is 99.5% empty space. Theorised shells

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James chadwick

1932 - 5th person. Modern atomic theory.