I'm not sure why you've been downvoted, what you say seems true. Smaller nukes are not necessarily efficient nukes. The smallest nukes, using a "linear implos

I'm not sure why you've been downvoted, what you say seems true. Smaller nukes are not necessarily efficient nukes. The smallest nukes, using a "linear implosion" design, are very inefficient. A W48 warhead with a tiny 0.072 kt yield has more Plutonium than the 21 kt "fat man" bomb dropped on Nagasaki. (~13kg for the former, <7kg for the later) https://en.wikipedia.org/wiki/W48 https://en.wikipedia.org/wiki/W48