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Atom: The smallest part of any material that cannot be broken up by chemical means. Each atom has a center (the nucleus) which contains protons and neutrons. Electrons orbit around the nucleus. The atom is primarily empty space.
If the nucleus of an atom were the size of the button on a baseball pitcher's cap, the electrons would be like dust particles revolving around the outside of the baseball stadium.
Atom.com is the web's daily source for funny videos, original web shows, animations, short films, games, blogs, contests and more web comedy. Watch and share our videos ...
n. A part or particle considered to be an irreducible constituent of a specified system. The irreducible, indestructible material unit postulated by ancient atomism ...
Atom is a way to read and write information on the web, and is considered a competitor/alternate format to RSs. Basic information about the format as well as on ...
The atom is a basic unit of matter. that consists of a dense, central nucleus. surrounded by a cloud of negatively charged. electrons. The atomic nucleus
noun 1. Physics . a. the smallest component of an element having the chemical properties of the element, consisting of a nucleus containing combinations of neutrons ...