Here's why:
* Atoms are neutral, meaning they have an equal number of protons (positive charge) and electrons (negative charge).
* Ions are atoms that have gained or lost electrons.
* Cations are positively charged ions formed when an atom loses electrons.
* Anions are negatively charged ions formed when an atom gains electrons.
The number of protons in an atom's nucleus (its atomic number) defines the element. Changing the number of protons would change the element itself, not just create an ion.
