Sodium-21 Will Emit Positrons Each Having an Energy of 4

question 69

Multiple Choice

Sodium-21 will emit positrons each having an energy of 4.0 × 10^-13 J. What is this energy in MeV?

• A)4.0 × 10 ^-7 MeV
• B)2.5 MeV
• C)40 MeV
• D)2.5 × 10 ⁶ MeV
• E)None of these choices are correct.

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