what is an electron?

An electron is a tiny subatomic particle with a negative electric charge that is one of the basic building blocks of atoms. It is much lighter than a proton (about 1/1836 of the proton’s mass) and carries a charge of about −1.6×10−19-1.6\times 10^{-19}−1.6×10−19 coulomb. Electrons are essential for the structure of atoms, for chemical bonding, and for the flow of electricity in circuits.

Core idea

• An electron is a fundamental particle that cannot be broken down into smaller known components.

• It has a negative electric charge and very small mass, making it the lightest stable subatomic particle known.

• Together with positively charged protons and neutral neutrons, electrons make up atoms, which in turn make up all ordinary matter.

Where electrons live in atoms

• Electrons are not inside the nucleus; they occupy regions around the nucleus often called shells or orbitals.

• Orbitals are probability regions where an electron is most likely to be found, and each orbital can hold up to two electrons.

• Different atoms have different numbers of electrons, and their arrangement in shells and orbitals determines the atom’s chemical behavior.

Why electrons matter

• In chemistry, electrons explain how atoms bond to form molecules, since chemical bonds involve sharing or transferring electrons.

• In electricity and electronics, moving electrons (especially free electrons in metals) form electric currents that power devices like phones and computers.

• In modern physics, electrons are key players in quantum mechanics, showing both wave-like and particle-like behavior at very small scales.

Quick forum-style perspective

“What is an electron?”
Think of it as the tiny, negatively charged “glue” and “messenger” of the microscopic world: it shapes atoms, carries current in wires, and reveals quantum weirdness in experiments.

TL;DR: An electron is a fundamental, negatively charged, extremely light particle found around atomic nuclei; it underpins atomic structure, chemical bonding, and electric currents.

Information gathered from public forums or data available on the internet and portrayed here.