-
460 BCE
Democritus
he found that atoms are small, hard particles that are constantly moving and he thought that were "uncuttable". -
460 BCE
Democritus Atom Model
This is what Democritus atom for their time -
John Dalton
He found out that atoms of different elements are different and atoms of the same elements are exactly alike. He also did experiments in combining elements and found elements combine in specific proportions. -
John Dalton
He thinks it looks the same as Democritus -
J.J Thomson
He conducted the cathode-ray tude experiment. His theory of the atomic structure lead to the "plum-pudding" model. He found that there are small, negatively charged particles inside an atom. -
J.J Thomson
Found that their are positive and negative charges -
Ernest Rutherford
He conducted the gold foil experiment and found most of an atom's mass is in the nucleus. also the electrons move in empty in the atom and atoms contain mostly empty space. -
Ernest Rutherford atomic model
found that the positive elections are in one spot -
Niels Bohr
Bohr found that electrons jump between levels from path to path. And he found that electrons travel in definite paths. -
Bohr Atomic Model
He thought that there were rings going around it. -
Erwin Schrodinger and Werner Heisenberg Atomic model
they found that there is a cloud around the atom not rings -
Erwin Schrodinger and Werner Heisenberg
They found that electron paths cannot be predicted .And that electron are found in electron clouds, not paths
