-
450
Democritius
Discovered the atom in 450 bc -
Antoine lavosier
the father of modern biology -
Law of conservation of mass
states that matter cannot be gained of destroyed -
Plum pudding atomic model
incorrect model -
Daltons atomic theory
States that all matter is made of atoms -
Law of definate proportions
las of definate proportions states that the chemical compound is always the same proportion of the element -
Dimitri mendeleev
arranged 62 elements into the periodic table -
ernest rutherford
created the rutherford model and the gold foil experiment -
Eugen Goldsttein
Discovered the cathode ray tube expirament -
Niels bohr
created quantum mechanical model -
JJ- Thomson
in 1897 JJ Thomson discovered electrons -
Cathode ray tube
proved the theory of electrons -
Robert Milikan
worked on the charge of the electron -
Gold foil expirament
the gold foil expirement proved that there was a nucleus in every atom -
Ruthorfurd model
configured the model of an atom -
Bohr planetary model
model of the atom -
Quantum mechanical model
gave shapeg of electrons -
Erwin Schrooinger
came up with the quantum theory -
James Chadwick
discovered nutron -
Lise Meltner
Proved that particals scatter