Answer the following questions about the radiochemistry involved in PET scans. All answers are numerical. (Hint: 1 mCi is exactly 3.7 x 107 Bq. ) a) Fluorine-18 decays primarily through positron emission, but also via electron capture. If a 18F nucleus decays by electron capture, what is the atomic number of the resulting nucleus?
Answer the following questions about the radiochemistry involved in PET scans. All answers are numerical. (Hint: 1 mCi is exactly 3.7 x 107 Bq. )
a) Fluorine-18 decays primarily through positron emission, but also via electron capture. If a 18F nucleus decays by electron capture, what is the
b) Fluorine-18 can be synthesized by smashing tritium (3.01605 amu) into 16O (15.99491 amu), which results in the formation of 18F (18.00094 amu) and a neutron (1.00866 amu) according to the this reaction: 3H + 16O → 18F + n
How much energy is emitted per mole in this reaction? ________x 10¹¹ J/mol
c) If the initial dose of 18F (t1/2 = 109.8 min) received by the patient is 12.00 milliCurie (mCi), what is the disintegration rate (in mCi) in the patient's body at exactly 24 hours after they receive that initial dose? ________x 10-⁹ mCi
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