Answer and Explanation:
Good Day mate!
A monatomic molecule is that some of the elements do not have a tendency to form a molecule. Which means, the molecule of an element is made up of only one atom. Thus, there are called as Monatomic molecule.
Some common examples of monatomic molecules :
1. Helium (He)
2. Neon (Ne)
3. Argon (Ar)
4. Xenon (Xe)