Chemistry timeline
Category: Other
Updated: 8 Nov 2017
Contributors
Created byKrysten Thompson
Attachments
Events
John Dalton -
Pictured atoms as tiny, in destructive particles, with no internal structureJ,J Thomson -
descovered the electron.Hantaro Nagaoka -
A atom has a central nucleus. Electrons move in orbits like the rings around the Saturn.Ernest Rutherford -
Discovers a atom has a small, dense, positively charged nucleus.Niels Borhr's -
Electron moves in a circular orbit at fixed distances from the nucleus.Louis de Broglie -
Moving particles like electrons has some properties of waves.Erwin Schrodinger -
Develops mathematical equations to describe the motion of electrons in atoms. Leads to the electron cloud model.James Chadwick -
Confirms the existence of neutrons, which have no charge. Atomic nuclei contain neutrons and positively charged protons.
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