Atomic Timeline

by johnathan Stephens

1803-John Dalton

John Dalton pictured atoms as tiny, indestructible particles, with no internal structure
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1897-J.J Thomson

A british scientist who discovered the electron which led to the creation of the plum pudding model
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1904-Hantaro Nagoaka

He suggested that an atom has a central nucleus and the electrons move in orbits like Saturn's rings
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1911-Ernest Rutherford

He stated that an atom has a dense, positively charged nucleus and that electrons move randomly around the nucleus
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1913-Niels Bohr

In his model, the elections move in spherical orbits at fixed distances from the nucleus
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1924- Louis de Broglie

He proposed that moving particles like electrons have some properties of waves.
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1926- Erwin Schrodinger

He developed mathematical equations to describe the motion of electrons in atoms
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1932-James Chadwick

He confirms the existence of neutrons,which have no charge.
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