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John Daltons Atomic Theory
In 1803 John Dalton come up with a theory about constitution and conductof matter.He believed that:
1. All matter is formed of atoms
2. That atoms are indivisible and invisible particles
3. That atoms of the same element are of the same class and the same mass.
4. The atoms that form compounds are in relation of entire and single numbers; can be of two or more different classes.
5.Chemical changes correspond to a combination by division or reordering of atoms forming part of a chemical reaction.