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400
democritus
made observations.theroized that everything was made of small particles called atoms. -
john dalton
observed postulates.
1. everything is made of atoms.
2. atoms cannot be broken down.
3. an atom of each element is unique. -
john dalton,
discovered that everything is made of atoms, and atoms cant be broken -
earnest ruthford
found out that atoms are mostly empty space and have tiny nucluses. -
jj thompson
conducted the cathode ray tube experiment. -
jj thompson
jj thompson was the first to find out that atoms had a negative charge in their electrons. -
earnest rutherford
rutherford conducted the gold foil experiment. -
nelis bohr
nelis bohr organized the levels in the electron cloud. -
earnest rutherford
he learned that atoms nutrons have no charge. -
fallout
it was discovered that splitting aroms has a by product and that is fallout or radiation, making the fter affects even worse then the explostion itself. -
otto hahn
was discovered that nuclear fissuion could be used to create vazst amounts of energy. -
nuclear fission in japan
was the first time we used nuclear product in the form of war -
german scientist
german scientist set out to male the most super heavy atom in the world with 119 protons in its nucli. but the atom decayed in a fraction of a second. -
atom bombs
scientist said as of 2012 there are more then 17000 atomic bombs in the world. -
quantum or modern theory
today the modern theory is made up by many scientist, and they all agree on uncertanty.
