-
The greeks thaught that the atom were small particles or invisible.
-
Dalton thaught that the atoms were solid spheres
-
Crookes discovered the Cathode ray tube
-
Thomson discovered electrons.
-
Rutherford discovered the nucleus in the Atom.
-
Neils Bohr discovered that electrons orbit the nucleus of the atom.
-
Heisenber discovered the Atom cloud.