How heavy would a teaspoon of material from a neutron star weigh?

Billions of tons

A neutron star is an object of mind-boggling density, formed when gravity compresses matter to such an extreme degree that protons and electrons merge into neutrons, and the resulting neutrons resist further compression via degeneracy pressure. This results in matter so tightly packed that astronomical scales must be used to describe its mass in everyday terms. Specifically, the text indicates that a volume as small as a single teaspoon scooped from the material of a neutron star would possess a mass equivalent to billions of tons. This immense density reflects the fact that nearly the entire mass of a massive star's core is squeezed into a sphere only slightly larger than a city.