When a Proton and an Antiproton Collide

question 10

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 nucleus 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 can not collide because the Coulomb barrier is too great.

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