* Reactivity Trends: Reactivity in nonmetals generally increases as you move up a group (column) and to the right across a period (row) on the periodic table.

* Phosphorus's Position: Phosphorus (P) is in Group 15 and Period 3.

* More Reactive Elements: Elements above and to the right of phosphorus would be more reactive. This includes:

* Nitrogen (N): Located above phosphorus in Group 15.

* Oxygen (O): Located to the right of phosphorus in Period 2.

Therefore, both nitrogen (N) and oxygen (O) would be expected to be more reactive than phosphorus (P).