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365
Aristotle
Aristotle believed that earth, wind, and, fire made up the atomic theory. -
Dalton
Dalton said
1. all matter is made upof an indiviual particle called atoms
2.all atoms of an element are the same
3.atoms of diffrent atoms are diffrent
4.Elements combined totegether in whole number ratios
5.Atoms are small hard spheres -
J.J Thomsom
discovered electron.
"the plum pudding model" -
Rutherford
Discovered neutron.
small very dense center with e- cloud around it, shaped like a sphere -
Neis Bohr
Planetary Model
e- orbit around the neuclus like planets around the sun -
James Chadwick
Discovered neutron -
Robert Millikan
Discovered charge and mass of an electron
the 3 subtronic particles
