* Electric charge is a fundamental property: It's an inherent characteristic of certain particles, just like their mass or spin.
* It's not a "thing" you can hold: You can't isolate charge like you can isolate a piece of matter. It's always associated with particles.
* It comes in two types: Positive and negative.
* Like charges repel, opposite charges attract: This is the foundation of electromagnetism.
Particles with electric charge:
* Electrons: Carry a negative charge.
* Protons: Carry a positive charge.
* Quarks: The fundamental building blocks of protons and neutrons. They also carry fractional charges.
Key Points:
* Charge is quantized: It comes in discrete units, the smallest of which is the charge of an electron.
* Conservation of charge: The total amount of charge in a closed system remains constant, even though it can be redistributed.
So, while we don't have a "substance" that is electric charge, it's a crucial property of the universe that governs how particles interact and forms the basis for many phenomena, including electricity and magnetism.
