-
400
Democritus
The year Democritus discovery was made in 400 B.C.
he was the first to create atomic atom.
Democritus hyypothesized that atoms cannot be destoryed or create.
1 atom of a model -
Dalton
The year Dalton discovery was made in 1803.
He discovery the number of electons.
The methood he used was 2 elements and putting them together.
He thought that atoms were small particles of a materials -
Thomson
The year Thomson discovery was made in 1897.
He discovered charges of electrons change the charge of the atom.
The method he used was Cathode ray tube with high voltage currents.
He thought electrons gave off electricity. -
Rutherford
The year Rutherford discovery was made in 1919.
He discovered protons that can change an element AND nucleus.
The method he used was Goil foil
He thought the atom looked like a nucleus cloud. -
Bohr
The year Bohr discovery was made in 1925.
He discovered that not one atom looked the same.
The method he used was quantom theory.
He thought not all atoms are the same charge. -
Heisenburg & Schchrodinger
The year heisenburg and Schrodinger discovery was made in1927.
They discovery the electron cloud atom
the method they used was quantom theory.
They thought the atom looked like a cloud.
