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.