Here's a breakdown:

* The Reaction: The burning of a metal in oxygen is a combustion reaction, where the metal reacts with oxygen to form a new compound. This reaction releases heat and light, which is why we see flames.

* The Products: The most common product of this reaction is a metal oxide. The specific oxide formed depends on the metal involved. For example:

* Sodium (Na) burns to form sodium oxide (Na₂O).

* Magnesium (Mg) burns to form magnesium oxide (MgO).

* Iron (Fe) burns to form iron oxide (Fe₂O₃), which is commonly known as rust.

* Other Possibilities: While metal oxides are the most common products, some metals can form other compounds depending on the conditions. For instance, burning lithium in oxygen can produce both lithium oxide (Li₂O) and lithium peroxide (Li₂O₂).

Let me know if you'd like to know more about specific metal combustion reactions!