* Electrons are negatively charged subatomic particles that orbit the nucleus of an atom. They are not located within the nucleus.

* Ions are atoms that have gained or lost electrons, resulting in a net electrical charge. They are not a separate type of subatomic particle.

The nucleus of an atom contains:

* Protons: Positively charged subatomic particles.

* Neutrons: Neutrally charged subatomic particles.

Let me know if you have any other questions about atoms and subatomic particles!