ΑΤΟΜΙΚΗ ΘΕΩΡΙΑ -ΙΣΤΟΡΙΚΗ ΑΝΑΔΡΟΜΗ

ΔΗΜΟΚΡΙΤΟΣ: DALTON> 1800 THOMSON 1897 electrons Rutherford 1911 planetary model NIELS BOHR 1913 ELECTRONS BELONG TO DIFFERENT ENERGY LEVELS New atomic theory PROTONS ARE MADE OF quarks ELECTRONS: BELONG TO A GROUP OF PARTICLES CALLED LEPTONS ISOTOPES : SAME NUMBER OF PROTONS BUT DIFFERENT NUMBER OF NEUTRONS