How many nitrogens do we need to have a chemical primary for a fusion weapon?

I suspect you'd need about 0.013 M total, based on https://en.wikipedia.org/wiki/Brown_dwarf#Deuterium_fusion

Looks like a very tiny lump of metallic nitrogen.

Eventually someone will make this.

Definitely not, the primer also needs to be somewhat stable.

This is one reason that even azides are not used in this capacity anymore, and metallic nitrogen would be orders of magnitude less stable. Not to mention requiring special conditions to not explode, like a laser trap or extreme pressures.

Whatever the conditions, if attained, would lead to a virtually undetectable fusion bomb. Nukes for everyone, yay!

A visible amount of the thing wouldn’t even need the fission part.