atomic+theory

Dalton's atomic theory had five parts. They are:

1.All matter is composed of extremely small particles called atoms.

2. Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties.'

3.Atoms cannot be subdivided, created or destroyed.

4.Atoms of different elements combine in simple whole-number ratios to form chemical compounds.

5.In chemical reactions atoms are combined separated or rearranged.

Even though we now know that the third part of his theory is incorrect the other four parts still hold true over 200 years later.