2021年3月24日 · A monatomic element is an element that is stable as an individual atom. The term combines the words “mono” and “atomic” and means “single atom.” Usually, a monatomic element refers to a monatomic gas. Under standard conditions, the noble gases are monatomic elements. At high temperatures, other elements exist in monatomic form.

The meaning of MONATOMIC is consisting of one atom; especially : having but one atom in the molecule.