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

I would assume that at some point the required neutron reflector would become so large that the conventional explosion that sets off the bomb is bigger than the nuclear explosion. At that point why bother.