The reaction between oxygen and boron results in the formation of boron oxide. Here's the chemical equation for the reaction:

4B(s) + 3O2(g) → 2B2O3(s)

In this reaction, four moles of solid boron (B) react with three moles of oxygen gas (O2) to produce two moles of solid boron oxide (B2O3). The reaction is exothermic, meaning that it releases heat.

Boron oxide is a white, amorphous solid that is insoluble in water. It is commonly used as a flux in the production of glass, ceramics, and glazes. It can also be used as an abrasive and as a source of boron in fertilizers.