Structure of an Atom

All matter is composed of atoms. An atom is composed of 3 types of sub-atomic particles:

1. Protons
2. Neutrons
3. Electrons

The protons and neutrons are present in the center of an atom, forming a small nucleus. The electrons orbit around the nucleus in shells or energy levels.

 

The simplified structure of a Lithium atom is shown below:

 

 

Atoms have no overall electrical charge, however the particles contain specific charge, listed below:

 

---