Do antimatter particles annhiliate only their corresponding "normal" particles?

Question

For instance, would an antiproton annihilate a neutron, or only a proton?

Answer 1

Antimatter only annihilates its corresponding "normal" particle, yes. However, your example of an antiproton and neutron will result in partial annihilation. Why? Because you are thinking too big. Crazy, I know.

The problem is that protons are made up of two "up" quarks (U) and one "down" quark (D). Neutrons are made of one U and two D. (Each U carries +2/3 charge, and each D carries -1/3 charge; check this to convince yourself the proton has a charge of 1 and the neutron has no net charge.) If an antiproton and neutron came into contact, we would be left with one anti-U, one D, and a whole bunch of energy.

Answer 2

They sure do! here is what NASA said about this.

What do you think of when you hear the word "antimatter?" Something exotic, something unreal? Something about your Chief Engineer not being able to keep the containment fields up during battle?

Well, to a few NASA and university researchers, antimatter may just be the future of human space travel. When it comes to packing a punch, antimatter/matter reactions can't be beat. When a particle and its antiparticle meet, they annihilate each other and their entire mass is converted into pure energy

Answer 3

The concept of particle and anti-particle came from an experiment when physicists passed some energy near to some intense electric field and viola......a position and an electron appeared.

When these two particles come together....we get energy again....
Apparently there is a possibility of an anti- universe and when it comes together with our universe: we are in trouble!