* Neutrality: Atoms are composed of protons (positively charged), neutrons (no charge), and electrons (negatively charged). In a neutral atom, the number of protons and electrons is equal. This means the positive and negative charges cancel each other out, resulting in no overall charge.

* Ions: Atoms can gain or lose electrons to become ions.

* Cations: When an atom loses electrons, it becomes positively charged (since it has more protons than electrons).

* Anions: When an atom gains electrons, it becomes negatively charged (since it has more electrons than protons).

In summary:

* Neutral atoms: Have an equal number of protons and electrons, resulting in no net charge.

* Ions: Form when atoms gain or lose electrons, leading to a net positive or negative charge.

It's important to note that the concept of "net charge" applies to individual atoms or ions, not to the atom as a whole. The atom itself remains neutral if the number of protons and electrons is equal.