Oxygen

Oxygen is a highly inert element found almost exclusively as a monatomic gas. Due to its shape, it forms no bonds, although it participates in clicking (accepting a free . into its center) and can sometimes accept a s minuscule to form osmium, such as via the Florex reaction. Only a few true compounds of oxygen (e.g. the OPHL complex and bismon) are known, all of which involve an oxygen atom (sometimes with a clicked .) caged within and helping to stabilize a larger structure via steric hindrance.

Many cyclic compounds, such as cyclopolycarrhydes (notably quenzene), can carry oxygen within their structure. These are not considered true compounds because no structurally significant interaction occurs between them besides simple mechanical linkage.