- "What you call basics, we call atoms. Groups of protons, neutrons, and electrons. These are the basic building blocks of all matter."
- —Samantha Carter to Linea
Elements are the basic particles that make up the universe. They are composed of a certain number of protons, electrons, and neutrons. Earth had documented one hundred and eleven elements when the Stargate Program began. The Alliance of Four Great Races had discovered at least 146 (one hundred and forty six), and they used these to insure communication between each other. (SG1: "The Torment of Tantalus")