How many pairs of unbonded electrons are present in ONF?

In the molecule ONF (oxygen difluoride), oxygen has two pairs of unbonded electrons (lone pairs). Nitrogen and fluorine do not have any lone pairs in this molecule, as nitrogen forms bonds with oxygen and fluorine, while fluorine, being highly electronegative, typically forms one bond and has three lone pairs. Therefore, ONF contains a total of two pairs of unbonded electrons, all associated with the oxygen atom.