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democritus
theorized eveything is made of small indivisible particles called atomos -
john dalton
made 3 postulates
1 eveything is made of atoms
2 atoms cannot be broken down
3 atoms in each element are unique -
robert milliken
he found out what the weight of an electron. He also found out that it has a negaitive charge -
earnest rutherford
expeirmented with gold foil
his discovery was that atoms are mostly empty space. positive dense nucleus -
jj tompson
experminted with cathod ray tubes
used plum pudding or the coclete chip cokkies -
neils bohr
came up with the bohr model
the bohr model is a model where the lowest energy electrons are closer to the nucleus -
louis de broglie
he came up with the broglie formula
which shows the relationship between mass volume and wave length -
werner hessenburg
came up with the uncertainty principle
which is that you can never tell where an electron will be
