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Atomic structure through time - Coggle Diagram
Atomic structure through time
Dalton's model
he concludes that various compounds were made yp of different atoms from different elements each with a different size and mass.
He showed that common substances always broke down into the same elements into the same proportions
in his model, atoms were invisible
He was a quaker and sought to challenge the Aristotelian theory
Rutherford's model
in accordance to Thompson's model, the thinly dispersed positive charge wouldn't have been enough to deflect the particles
In the experiment, most of the particles went through however some where deflected back
he shot small positives charged alpha particles at a sheet of gold foil
became known as the father of the nuclear age
he concluded that atoms consisted mostly of empty space with just a few electrons. Most of the mass was concentrated in the centre which was named the nucleus. The alpha particles passed through the gaps but bounced of the more dense, positive nucleus
Thompson's model
he won the Nobel prize in 1906 for his discovery
plum pudding model -
he showed atoms as uniformly packed spheres of positive matter filled with negatively charged electrons
he discovered the electron
Bohr's model
Electron shells
he though electrons orbit the nucleus at fixed energies and distances, able to jump from one level to another but not exist in the space between
he expanded on R's model