Here's why:

* Electrons are fundamental particles that carry a negative charge. They are found orbiting the nucleus of an atom.

* Protons are also fundamental particles, but they carry a positive charge.

* Neutrons are neutral particles found in the nucleus of an atom.

The balance between protons and electrons determines the overall charge of an atom or molecule. If an atom has more electrons than protons, it has a negative charge and is called an anion. If an atom has more protons than electrons, it has a positive charge and is called a cation.