* Combustion requires a rapid reaction with oxygen that produces heat and light. Silver does not react readily with oxygen at normal temperatures.

* Silver tarnishes, but this is a slow surface reaction that forms a layer of silver sulfide (Ag2S). It's not the same as combustion.

* Silver's reactivity: Silver is considered a noble metal, meaning it is relatively unreactive compared to other metals.

In summary: While silver can react with oxygen to form tarnish, it does not undergo the rapid, exothermic reaction that defines combustion.