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gracweeb gracweeb
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6 years ago
21. In positron emission tomography, when positrons come into contact with a free electron, they are annihilated. This annihilation produces two byproducts
 
  a) 2 photons
  b) 2 protons
  c) 2 electrons
  d) 2 positrons
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summer123summer123
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gracweeb Author
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6 years ago
Smart ... Thanks!
2ne1_12345
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Yesterday
Correct Slight Smile TY
asd454512
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2 hours ago
this is exactly what I needed
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