In your own words, describe what is occurring during the process of electron beta decay, explaining what is ejected from the unstable nucleus and focusing subatomic changes. (2 points for clear and accurate description).
Write balanced chemical reactions for the following: (1 point each, 4 points total)
Strontium-89 is an isotope used in the treatment of bone cancer and has a half- life of 50.57 days. If 20 grams of this isotope is injected into a patient, how much will remain after 354 days? (1 point for correct answer with all work shown).
An isotope has a half-life of 45 minutes. What % of a sample of this isotope will remain after 1.5 hours, assuming that we start with 100%? (1 point for correct answer with all work shown).
Compare and contrast a source of ionizing energy with a source of non-ionizing energy. (1 point)
MC/select all questions: 1 point each
Which of the following would be an exothermic process? There may be more than one correct answer.
Which polymer(s) is/are found in the human body? (select all that apply).
Molybdenum-99 decays by beta decay emission, resulting in an electron and:
In the process of electron capture:
In alpha decay, what change is observed in the atomic number?
In beta decay, what change is observed in the atomic number?
An isotope with 82 neutrons and 49 protons undergoes positron emission. How many neutrons will be in the new isotope?
Which of the following is an exothermic process”
You have four potential imaging isotopes, A, B, C, and D. Their half-lives are 50 seconds, 10 mins, 18 hours, and 6 years respectively. Which of these would you choose for medical imaging applications?
This radioactive decay process causes a decrease in the atomic number. More than one answer may be correct:
-80x80.JPG "CHEM 120 Week 2 Discussion; Atomic Structure")
-80x80.JPG "CHEM 120 Week 6 Discussion: Radiation - Radioisotope Tc-99m")
