A good reaction that gives off a bright light occurs when magnesium is burned in a bunsen burner. As a result, it binds with oxygen in the air. What is the balanced chemical equation for this reaction?

A)
Mg + O → MgO


B)
Mg + O2 → MgO2


C)
2Mg + O → Mg2O


D)
2Mg + O2 → 2MgO