monoatomic
/ˌmɑnoʊəˈtɑmɪk/
adjective
- Consisting of a single atom; used to describe a gas or element whose particles are individual atoms rather than molecules.
- Helium is a monoatomic gas, meaning each particle is just one atom.
- Monoatomic ions like sodium (Na+) are common in chemistry.
- Noble gases such as neon exist in a monoatomic form.