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

there is. its called the critical mass. you have to have more radioactive material than the critical mass or you wont get a nuclear explosion. Critical mass is 47kg for weapons grade uranium, but only 10kg for plutonium

as for taking out a single house, probiably not, but then, there is no point. its much easier to just use conventional explosives for that