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Democritus
-Democritus thought everything was made of small particles.
-He also thought they were invisible.
-"Father" of atoms. Named them atomos. -
John Dalton
-John Dalton believed everything had atoms.
-He thought they couldnt break.
-He found out this theory in 1911.
-He thought every element was different. -
Jj Thompson
Jj Thompson thought atoms had electrons.
-He thought electrons were all throughput the atoms. -
Earnest Rutherford
-He knew the nucleus was positive.
-He thought atoms were empty space.
-Atoms were dense and small. -
Neils Bohr
-Neils Bohr organized electrons into energy levels.
-He discovered this in 1913. -
Modern Theory
-Now, they have found out atoms have nuetrons and isotopes.
-They know they have uncertaim principles; the principle that the momentum and position of a particle cant both be measured with arbitrarily high precision.
-Scientist like; Einstein ,Debrogile, Schrodinger, and Heinsberg, had a big part in the development of the atomic theory.
