Dalton’s atomic theory was based on two laws, namely the law of conservation of mass (Lavoisier law) The total mass of substances before the reaction will always equal the total mass of the substances the reaction.” Legal structure and fixed (Law Prouts). Comparison of the mass of the elements in a compound always remain.

From both the above laws daltons expressed the opinion:
1. Atoms are the smallest part of the material as it can not be subdivided;
2. Atom is described as a very small solid ball, an element has atoms are identical and differ for different elements;
3. Atoms combine to form compounds with a ratio of integers and simple.

For example, water consists of hydrogen atoms and oxygen atoms;
4. The chemical reaction is the separation or amalgamation or a rearrangement of atoms, so that atoms can not be created or destroyed.
Indonesian Version