Question

A good theory in science simultaneously is consistent with previous observations and makes predictions that can be tested through future observation and, ideally, experiments. That is, a scientific theory needs to be testable.

Atomic theory - that is, an atom is the smallest division of an element that retains the chemical properties of the element and is too small to be seen - cannot be tested using by sight, not even using an optical microscope. Pay attention to the various forms of evidence that atoms exist. What kinds of technology are needed to show atoms exist? What kinds of indirect observations were made?

In your first post of this discussion, please communicate one piece of evidence for the existence of atoms: describe briefly what the evidence is and where you read about it.

Answer 1

The atoms cann't be seen under the microscope. An object can be seen if it deflects visible light but the atoms are so small than the wavelength of visible light. Hence atoms are invisisible to visible light.

There are some effect of atoms which we can observe and hence give the evidence of existance of atom. Experiments shows that the molecules gas chemical formula with inter ratio of there components such as CH4 for metahne (1:4). This is indication of the fact that molecules are made of atoms.

Brownean motion also indicate the matter is made of atoms and they do random motion. Continously interact with each other.

I will be glad to see your comment if you have any query. Thanks...