[bert]

.....Plutonium is just a metal. It also burns....

I will give you the benefir of FReeper doubt, but did a google search on plutonium burn and plutonium oxide. If it burns, it makes plutonium oxide.

Turns out, the most common form of plutonium seems to be plutonium oxids, not the pure metal.

If it is already oxide, it won’t burn .....

[ScaniaBoy]

And whether it burns or not it is still radioactive....

[null and void]

True, but it would have to be refined into the metallic form for a weapon.

[antiRepublicrat]

Turns out, the most common form of plutonium seems to be plutonium oxids, not the pure metal.

Plutonium can form plutonium hydride in the presence of air and water, and that will catch fire all by itself. But normally you won't ever see pure plutonium, as they stabilize it with other metals when making bombs. Still, the point is that plutonium is not indestructible. It's just a metal, a very strange one, but still just a metal.