* Like charges repel: This is a fundamental principle in physics. Particles with the same charge (both positive or both negative) push each other away.

* Examples of like charges:

* Protons: These are positively charged particles found in the nucleus of an atom. Two protons will repel each other.

* Electrons: These are negatively charged particles that orbit the nucleus. Two electrons will also repel each other.

Let me know if you have any more questions about charges and particles!