1. Which of the following would complete the radioactive decay equation shown below? 2. What type of radioactive decay is shown in the equation below? 11C 11 B+? 6 5 He 183. The halflife of Barium139 is 4.96 x103 seconds. A sample contains 3.21 x10\" nuclei. How much of the sample is left after 1.98 x10'1 seconds? I 8.03 x1015 nuclei 2.01 x1015 nuclei l 4.01 x1015 nuclei I 1.61x10\"nuclei 4. The halflife of Silver105 is 3.57 x106 seconds. A sample contains 5.78 x10\" nuclei. How much of the sample is left after '1 .07 x10? seconds? 3 2.89x10'7nuclei J 3.61x10'5nuclei 7.23x10'5nuclei 3 1.45 x10\" nuclei 5. Aftel four halflives, how much of the original sample would remain? I 12.5% 6.25% | 25% | 50% \f7. The halflife of Silver1 05 is 3.57 X106 seconds. A sample contains 5.78 x1017 nuclei. What is the decay constant for this decay? 1.371(10'?s'1 1.54x10-? 5-1 1.94x10'7 8'1 1.73x10'7 8'1 8. Which of the following are true regarding beta plus decay? {Select all that apply) the nucleus emits a highenergy positron the nucleus emits a highenergy electron emits a neutrino emits an antineutrino 9. The halflife of Barium139 is 4.96 x103 seconds. A sample contains 3.21 x 1 O1 7 nuclei. What is the decay constant for this decay? )1.67x10-4 3-1 J 5.:3 x104 3-1 1.1-0 x104 3'1 J 2.22 x 10-4 3-1 it} Which of the following are true regarding gamma decay? [Select all that apply} it does not change the atomic numher of the parent it does not change the atomic mass of the parent it occurs when a parent is excited and returns to a relaxed state it occurs when a parent released as neutrino