* Protons: Positively charged particles found in the nucleus of the atom.

* Neutrons: Neutral particles found in the nucleus of the atom.

* Electrons: Negatively charged particles that orbit the nucleus in shells or energy levels.

Here's a breakdown:

* Nucleus: The central part of an atom containing the protons and neutrons. It's very dense and holds almost all of the atom's mass.

* Electron Cloud: The region surrounding the nucleus where the electrons are found. They are constantly in motion and occupy specific energy levels.

The number of protons in an atom defines its atomic number and determines which element it is. The number of neutrons can vary, leading to isotopes of the same element. The number of electrons usually matches the number of protons, making the atom electrically neutral.