is there a lower limit on the size of a nuclear bomb?

Question

And if so, what factors determine it?

I know that the scale of the explosion is an insane amount larger than the teeny molecules causing it, but I’m wondering if there could ever be nuclear explosions small enough to take out a single house or block, rather than a whole city from high above.

In: Physics

Answer 1

Well there is the Davy Crockett nuke with 5 kg of compressed plutonimum (correct me if I’m wrong) that has a blast radius of 160m. Armored vehicles would be safe from the blast.

There’s also the Wee Gwen which was supposed to have 3kg or fissable material