#1 Identify the following diagnostic procedure that gives the highest dose of ra

Question

#1 Identify the following diagnostic procedure that gives the highest dose of radiation.   

#2 Rutherfordium-257 was synthesized by bombarding Cf?249 with C?12. Write a nuclear equation for this reaction.   

249 98Cf+126C?257 104Rf+4 10n

#3 Which statement is true regarding the sublimation of dry ice (solid CO2)?

upper gastrointestinal tract x-ray chest x-ray dental x-ray ? two bitewings thallium heart scan Write a nuclear equation for this reaction. 257 104 104 R 2He 27 RfHe 104 O 249 104 RI + 4n Submit My Answers Give Up Incorrect; Try Again; 5 attempts remaining

Explanation / Answer

1) thallium heart scan

2)24998Cf+126C257104Rf+4 n (four neutrons n(1,0) are emitted.)

3) H is positive, S is positive, and G is positive at low temperature and negative at high temperature

dry ice sublimates at -78.5oC, so at higher temperatures sublimation is feasible G is negative.change of state is from solid to gaseous so increase in entropy or degree of disorderliness,S is positive. endothermic so H is positive

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