jan 6, 1803 - Model: His model was called the billiard ball model. He interpreted the atom to be a ball-like structure. Experiment: Dalton experimented with gases. His experiments led to a discovery that the total pressure of a mixture of gases amounted to the sum of the partial pressures that each individual gas exerted while occupying the same space
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Date:
jan 6, 1803
Now
~ 222 years ago