Here's why:

* Atoms are the basic building blocks of matter. They have a neutral charge because they have an equal number of protons (positive charge) and electrons (negative charge).

* Ions are atoms that have gained or lost electrons, giving them a net positive or negative charge.

* Cations are positively charged ions formed when an atom *loses* electrons.

* Anions are negatively charged ions formed when an atom *gains* electrons.

Let me know if you have any more questions!