* Monatomic ions consist of a single atom with a positive or negative charge. Examples include sodium ion (Na+) and chloride ion (Cl-).
* Sulfur hexafluoride (SF6) is a covalent compound. This means it's formed by the sharing of electrons between sulfur and fluorine atoms. It does not have a net charge and does not exist as individual ions.
Therefore, SF6 is a molecule, not a monatomic ion.
