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400
Democritus Discovers Atom
Greek Philosopher Democritus first suggested that all substances consisted of tiny indestructible particles called atoms -
Period: 400 to
Atomic Models
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John Dalton's Model
Nothing Changed, Just Redicovered -
Thomson's Model
Pulm Pudding Is The Name Of This GLORIOUS Model -
Lord Rutherford's Model
Discovers The Atom Consists Mostly Of Empty Space -
Niels Bohr's Model
Electrons Orbit Nucleus! -
Chadwick's Model
Neutrons Discovered.