No. Antineutrons don't exist in the proverbial vacuum, they're comprised of more fundamental particles called quarks, in this case antiquarks.
Antineutrons are made of two antidown quarks and one antiup quark.
A proton is comprised of two up quarks, and a down quark.
So, if you stick an antineutron in contact with say two regular protons they'll annihlate and, if you're lucky, create a Δ++ baryon that'll decay into a proton and a positively charged pion that'll then decay into a muon and muon neutrino, and then that muon will decay into an electron, an electron neutrino, and an antimuon neutrino that'll annihilate with the muon neutrino that was made when the pion decayed and leave you, ultimately, with a hydrogen atom.
CainIsmene t1_jc0bw4s wrote
Reply to As they still have a neutral charge, can antineutrons replace neutrons in a regular atom? by Oheligud
No. Antineutrons don't exist in the proverbial vacuum, they're comprised of more fundamental particles called quarks, in this case antiquarks.
Antineutrons are made of two antidown quarks and one antiup quark.
A proton is comprised of two up quarks, and a down quark.
So, if you stick an antineutron in contact with say two regular protons they'll annihlate and, if you're lucky, create a Δ++ baryon that'll decay into a proton and a positively charged pion that'll then decay into a muon and muon neutrino, and then that muon will decay into an electron, an electron neutrino, and an antimuon neutrino that'll annihilate with the muon neutrino that was made when the pion decayed and leave you, ultimately, with a hydrogen atom.
subatomic physics is weird my man