An alpha particle is a high-energy particle that contains A) one proton and one neutron B) two protons and two ncutrons. 1. C) one electron. D) one proton. Which type of radiation has a negligible mass and a charge of +1? A) alpha particle B) gamma ray C) positron

2. beta particle Which is the symbol for a beta particle? A)e 3. B) e Phosphorous-32 is used for organ imaging. How many neutrons are present in this radioisotope? C) 32 D) 47 B) 17 A) 15 5. Which species completes the nuclear equation shown below? What does it mean if a substance is described as being radioactive? A) B) C) 6. The substance emits high energy particles or rays from its unstable nucleus. The substance was exposed to radiation that was given off by a decaying nucleus. The substance readily absorbs energy from the radiofrequency region of the electromagnetic spectrum. The substance is extremely small and special radiomicroscopes are necessary to view it. D) 7. Which species completes this nuclear equation shown below? The half-life (ti2) of a radioactive isotope depends on which of the following? A) C) 8. B) the isotope E) the amount of the radioisotope present the temperature all of the factors listed D) the pressure If the half-life of phosphorus-32 is 14.3 days, how much of a 200. mg sample of phosphorus- 32 remains after 71.5 days? А) 100. mg 9. D) 6.25 mg C) 12.5 mg B) 50. mg What is the estimated the age of an artifact that has 1/16 of the amount of carbon-14 (relative 10. to carbon-12) compared to living organisms. (C-14 t12 5,730 years) D) 22,920 years E) 28,650 years A) 358 years B) 5,730 years C) 17,190 years