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en.wikipedia.org

Atom - Wikipedia

Though the word atom originally denoted a particle that cannot be cut into smaller particles, in modern scientific usage the atom is composed of various subatomic particles.

atom-editor.cc

Atom

Dec 15, 2022 · Atom is a desktop application built with HTML, JavaScript, CSS, and Node.js integration. It runs on Electron, a framework for building cross platform apps using web technologies. Atom is open source. Be...

www.britannica.com

Atom | Definition, Structure, History, Examples, Diagram ...

6 days ago · An atom is the smallest unit into which matter can be divided without the release of electrically charged particles. It also is the smallest unit of matter that has the characteristic properties of a chem...

www.iaea.org

What is an Atom? - International Atomic Energy Agency

Jan 5, 2026 · Atoms are the building blocks of matter. Everything around us — from air and water, to rocks, plants and animals — as well as everything within our bodies, is made up of atoms. They are very small, the s...

www.lindahall.org

A. What is an Atom? - Linda Hall Library

5 days ago · An atom is the smallest particle into which an element can be divided without losing its chemical identity. Atoms consist of a heavy central nucleus surrounded by a cloud of negatively charged particles c...

www.geeksforgeeks.org

What is Atom? - GeeksforGeeks

Jul 23, 2025 · Atoms are defined as the smallest particle that can exist independently in nature and can participate in a chemical reaction. Atoms are the building block of all the matter in the universe. The word ter...

www.nrc.gov

What is an atom ? | Nuclear Regulatory Commission - NRC

Anything that has a mass—in other words, anything that occupies space—is composed of atoms. While its name originally referred to a particle that couldn't be divided any more—the smallest thing possible—we now know th...