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AirborneRodent t1_iu850s6 wrote

Reply to comment by scurvydog-uldum in TIL that antimatter is made with antiprotons, which are the opposite of protons, with a negative charge, antineutrons with a neutral charge and positrons, which are the opposite of electrons, with a positive charge. by Doomguy2021

You have to go smaller. A neutron is made of an up quark (+2/3 charge) and two down quarks (-1/3 charge each). An antineutron is made of an up antiquark (-2/3 charge) and two down antiquarks (+1/3 charge each).

Even though they both sum to zero charge, they're still opposite. And they still annihilate each other if they come in contact.

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