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Unformatted text preview: At 298 K the rate constant is 3.46 x 10-5 s-1 . At what temperature is the rate constant 9.63 x 10-5 s-1 ? Show your work and circle your answer. a. 0.305 K b. 305 K c. 328 K d. 829 K e. 291 K 4. What is the name for a positive electron? _______________ 5. What exactly is an alpha particle made of? ________________________________ 6. Americium-241 is used in smoke detectors and it is an alpha emitter. Write the alpha decay reaction. 7. Write the beta decay reaction for strontium-90. 8. Write the positron decay reaction for iodine-124, which is used in therapeutic PET scans. 9. Write the electron capture reaction for aluminum-26. 10. Fill in the blank. 23 11 Na + ___________ J 24 11 Na + 1 1 H 11. Fill in the blank. 59 27 Co + 1 n J 56 25 Mn + ___________ 12. Magnesium-28 has a half-life of 21.0 hours. How much of a 34.5 gram sample would remain after 4.00 days? Show your work....
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