17 ene 1803 año - John Dalton proposed his atomic theory.

Descripción:

John Dalton was an english scientist that proposed a new theory on atomic theory.
1. All elements are made up tiny particles called atoms
2. Elements of the same type are completely identical
3. Atoms cannot be created, destroyed or subdivided
4. Elements can be combined to make compounds
5. In chemical reactions elements combine, separate, or rearange.
He was born in 1766 and died 1844

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