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When a Proton and an Antiproton Collide

Question 31

Multiple Choice

When a proton and an antiproton collide


A) they destroy each other and produce energy in the form of gamma rays.
B) one of the protons is converted to a neutron and they form a nucleus consisting of one proton and one neutron.
C) one of the protons is converted to an electron and they form a hydrogen atom.
D) one proton is converted to a neutron and the other is converted to an electron.
E) A proton and an antiproton cannot collide because the Coulomb barrier is too great.

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