Peeling Away the Layers.

The article discusses the different layers that make up an atom. The electrons go around the nucleus in layers. They can jump from layer to layer if a force effects them. Every atom has a different amount of electrons. This number is the charge of the atom. Niehls Bohr developed a theory called the Quantum Theory in 1913. In 1932 scientists discovered that neutrons are inside the nucleus with the protons. Neutrons have no charge.