(also monoatomic /ˌmonōəˈtämik/)
Consisting of one atom.
- Although the most common anion formed by oxygen is monatomic, oxygen can also form diatomic ions known as peroxides and superoxides (monovalent).
- For example, aluminum, helium, and sodium are monatomic elements, or elements whose atoms can exist alone, without forming molecules.
- Data for monatomic gases like argon and helium give exact agreement, and many diatomic gases show experimental results in close accord with the theory.
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