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400
Demorcritus
the atom is a piece of an object that cannot be broken down into smaller pieces. the method that helped him discover it was the scientific theroy.he thought the atom looked like a piece that can not be broken down anymore -
Thomson
he discovered electrons and protons. He studied the rays that travel between charged metal plates in a vaccum taabel. He compared the atom to a blueberry muffin and the electrons were the blueberries and the positive substances was the dough. -
Dalton
matteer consists of indivisble atoms & atoms arrange in diffrent combinations to make different compunds. He used billard bills method to make he atom -
Heisenberg and Schrodinger
he looked at the small pieces that made up at atom. He took the reaserch from others and looked into it even further.He thought atoms were made up of electrons and protons. -
Rutherford
He discovered the nucleus of the atom. and He added to the atom becasue before they only had proton and electrons now the atom has an nucleus. The results of expirements in which he bombarded sheets of gold with alpha particles -
Bohr
ddepends on how small the atoms are & Charged nucleus surronded by elements by elements that travel in circular obbity around the nucleus. The Rydberg method is what he used to creae the atom .. he described atoms as inadequate