You can't label the three basic parts of an atom on a physical object. Atoms are incredibly small and can't be seen with the naked eye, even with the most powerful microscopes.

However, you can represent the three parts of an atom in a diagram:

1. Protons and neutrons: These are found in the center of the atom, which is called the nucleus. You would draw them close together in the center of your diagram.

2. Electrons: These orbit the nucleus in shells or energy levels. You would draw them as circles or lines around the nucleus, representing their orbits.

Here's a way to remember the basic structure of an atom:

* Nucleus: Imagine a tiny, dense ball at the center of the atom. This is where the protons and neutrons live.

* Electrons: Imagine a bunch of smaller particles buzzing around the nucleus in specific paths. These are the electrons.

Remember, these are just simplified representations. The actual behavior of electrons is much more complex and quantum mechanical.