Why do we need the Atomic Theory?

Question

Well, I know what it is. I just don't get why we need it. Why is it an essential need in chemistry?

Answer 1

To further the previous thread...

Thanks to Atomic Theory not only do we understand our world better but:

we developed electricity (by better understanding chemistry); we understand radioactivity (for medicine, power as well as geologic history); all gas laws are derived from it (think Avogadro); Many explanations of cellular biological functions are aided; and we now have the means to understand many things about the origin of our universe through its offshoot; Quantum theory.

Much of High School science is directly related to Atomic theory in one way or another.

Answer 2

Of course we need it. The atomic theory explains how we undestand all chemical bonding and all chemistry and is the basis of chemistry and phystics.