The Atomic Theory of J.J. Thompson

Joseph John Thompson (1903)

In the opinion of J.J. Thompson, the atom is shaped like a bun and explains that the positively charged atoms in the presence of negatively charged electrons surrounding it.

Note:
(+) = Proton
(-) = Electron

Electron discovered by J.J. Thompson through a cathode ray tube experiments. At that time, Thompson noticed that if the electric current passing through a vacuum tube, there is a kind of sparkling formed. And found that the light sparkling turn to the positive plate.

Thompson then called sparkling streams such as electrons.

Thompson's Atomic Excess:
1. Proving the existence of other negatively charged particles in the atom. Which means that the atom is not the smallest part of an element.
2. Can explain the electrical properties of atoms.
3. Can explain the existence of particles smaller than atoms called subatomic.

Thompson's Atomic Shortage:
1. Unable to explain the phenomenon of out alpha particles by a thin membrane gold-stated by Rutherford.
2. Not being able to explain the existence of the atomic nucleus.
3. Thompson's atomic model can not explain the arrangement of positive and negative charges in the atomic sphere.

A few information about atomic theory J.J. Thompson, please comment if there are deficiencies or errors of this article.