Question

How many single bonds can oxygen form?

Answer 1

By and large, the number and sort of bonds conceivable with any component are dictated by the valence electrons. Those are the furthest electrons, which might be partaken in covalent bonds, or surrendered in ionic bonds.
"Missing" valence electrons are similarly significant, as they demonstrate orbitals that should be finished through electron sharing or obtaining from another component. The "octet rule" ought to be applied to a component's valence electrons to perceive the number of bonds it can frame to "complete" its external shell.

Complete answer:
Oxygen can frame two single bonds since it has six valence electrons on its external shell.
It is simpler for an oxygen particle to acknowledge or share two electrons as opposed to losing each of the six to get steady (Remember that solidness includes having a filled external shell. For this situation, oxygen needs $8$ electrons on its external shell to be filled.).
So it can covalently twofold bond once or single bond twice.

Note:
We need to know the oxygen (O), nonmetallic compound component of Group $16$ of the occasional table. Oxygen is a dry, scentless, boring gas vital for living organic entities, being taken up by creatures, which convert it to carbon dioxide; plants, thus, use carbon dioxide as a wellspring of carbon and return the oxygen to the climate. Oxygen structures compounds by response with basically some other component, just as by responses that dislodge components from their mixes with one another; much of the time, these cycles are joined by the development of warmth and light and in such cases are called ignitions. Its most significant compound is water.