neutronfree
neutronfree is a term that can refer to a hypothetical state or material that contains no neutrons. Neutrons are subatomic particles found in the nucleus of most atoms, alongside protons. The absence of neutrons would significantly alter the properties of matter as we understand it. For example, all isotopes of hydrogen except protium (which has one proton and no neutrons) contain neutrons. Elements with atomic numbers greater than one, like helium, lithium, and all heavier elements, typically have neutrons in their nuclei.
The concept of neutronfree matter is largely theoretical and is not observed in naturally occurring substances.