ATOM DEVELOPMENT THEORY

ATOM development THEORY

1). Dalton Atom Model
a) Atom is described as pejal the ball is very small.
b) Atom is the smallest particles that can not be parsed again.
c) Atom has the same elements of a similar nature, while the atom different elements, different in mass and nature.
d) if the compound form atom join with each other.
e) Reaction chemistry is just reorganization of atom-atom, so there is no atom has changed due to chemical reactions.




Figure Model Atom Dalton

Dalton atomic theory is supported by 2 natural law, namely:
1. Legal Immortality Massa (Lavoisier law): mass substances before and after the reaction is the same.
2. Law Comparison Stay (legal Proust): comparison of mass elements composing a substance that is permanent.

The weakness of the Atomic Model Dalton:
1) Can not explain the difference between the elements of a single atom with the other elements
2) Can not explain the nature of the power of the materials
3) can not describe how each atom-atom berikatan
4) According to the theory of atomic Dalton number 5, have not changed due to the heavy chemical reaction. Now that chemical reaction with nuclear, an atom can be changed to another atom.