Preview File Edit View Go Tools Window Help 79% Sat 2:43 PM O Lab 13 Radioactivity Lab Questions.pdf (page 1 of 4) Q Search Lab 13 Radioactivity Lab Question... PHY 1 12 Radioactive Decay PHY112 Radioactive Decay earning Objectives mtrod.son newuse of an atom This radiation may take on the form of ligh energy gamma ray photons. may be date of und route me cling productis set ad the daughter botops Hu dajesse time can be predicted from s of parentisotopes let in a N = Net where N is the original number of parent is copes at Simat = 0,e = 2718.. and Learning Objectives of the 20.631 7% whenthat the sample remains. the meat is to =(h 2/A 1= 0693/ tes . The decay cors tant can be fought of as arazzo. seeitis in writs of rate is . To demonstrate that rates of decay of unstable nuclei can be measured. Materials . what of paper Examine the random nature of radioactive decay. . . To graph the results of a simulated radioactive decay. Estimate the half-life of radioactivity, and determine the decay constant for a 1 hypothetical element. Introduction Procedure Radioactivity or radioactive decay is the spontaneous emission of radiation from an unstable nucleus of an atom. This radiation may take on the form of high energy gamma-ray photons, Beganbrewedzarif go cackle what to so with the or an ejected particle such as an alpha or beta particle. In either case, the state of the original Number of Radioactive Nude Tosa 5 01) Number of Radioactive Nucki nucleus becomes different after the decay occurs. The original unstable nucleus is referred to as the parent isotope, while the resulting product is called the daughter isotope. The daughter may be stable or undergo another decay. Analysis (at ysis sections 2 With a decay rate that follows from a random nature of disintegrations, a large number of particles will follow an exponential decay function. The number of parent isotopes left in a sample after a certain amount of time can be predicted from this equation: of your form s indicated bebowl N = Noe At where No is the original number of parent isotopes at time t = 0, e = 2.718... and A is the decay constant. 30 .30 ...Preview File Edit View Go Tools Window Help 79% Sat 2:43 PM O Lab 13 Radioactivity Lab Questions.pdf (page 1 of 4) Q Search Lab 13 Radioactivity Lab Question... PHY 1 12 Radioactive Decay If we solve for the time when half the sample remains, the result is t1/2 = (In 2) / A Shot earning Objectives or t1/2 = 0.693 / A 3.27 PM mtrod.son newuse of an atom This radiation may take on the form of ligh energy gamma ray photons. may be date of und route me cling productis set ad the daughter botops Hu dajesse This is known as the half-life. Solving for the decay constant in terms of the half-life is thus: time can be predicted from s of parentisotopes let in a N = Net where N is the original number of parent h chopes at Simat = 0,e = 2718.. and A = 0.693 / t1/2 . The decay constant can be thought of as a rate, since it is in units of of the 20.631 7% whenthat the sample remains. the meat is to =(h 2/A 1= 0693/ tes . The decay cors batt can be fought of as arazzo. sinceitis in units of reciprocal time, or a number per unit time. The larger this number, the more rapid the decay rate is Materials rate is. . sheet of paper 1 Materials small candies such as plain M&M's or Skittles which are marked on one side . a cup Procedure sheet of paper Beganbrewedzarif go cackle what to a with the Number of Radioactive Nude Toss 3 014) Number of Radioactive Nuchi Analysis (at Error Analysis sections 2 of your form nidcated bebowl Procedure 30 FPreview File Edit View Go Tools Window Help 79% Sat 2:43 PM Q O Lab 13 Radioactivity Lab Questions.pdf (page 2 of 4) Q Search Lab 13 Radioactivity Lab Question... PHY 1 12 Radioactive Decay Procedure Shot earning Objectives 3.27 PM - Examine the random satire of nadiaraw bay meetus of an atom This radiation may take on the form of ligh energy gamma ray photons. In this simulation, you will use small pieces of candy marked on one side, which will act as may be came of und you men cling productis set ed the daughter botope Hu dajesse your "nuclei". After rolling the candies onto a flat surface, those with the marked side down will time can be predicted from's of parentisotopes left in a N = Net where N is the original number of parent is chopes at Simat = 0,e = 2718.. and be the radioactive parent, while those with the mark side up will be the decayed daughters. of tos 20.gas 1% when hat the sample remains the meat is to =(h 2/A 1= 0693/ tes . The decay cors batt can be thought of as arazzo. since itis in write of rate is For this exercise, we will assume that the daughter products are stable and no other particles Materials are emitted. 1. Count out a fairly large sample of candies which will give you at least 4 half-lives before you decay to an odd number. 80 candies will do this as the 4th half-life will have 5 left. 32 candies will also work, although the smaller number statistics will increase random error. 96 candies will actually give you 5 half-lives. Write this number in the Procedure data table under the "Number of Radioactive Nuclei" next to the zero "Toss #" 2. Place your "nuclei" in a paper cup, cover and shake the cup. Pour and spread the "nuclei" onto your sheet of paper. Separate the "nuclei" into two piles, one with the Beganbrewedzarif Mo cacke what to so with the marked side up and the other with the marked side down. Count the number of "nuclei" Number of Radioacare Nude Toss 5 010) Number of Radondive Nucki in each pile. In your data table, record the number of "radioactive nuclei" candies with the marked side down that remain in the sample. Analysis (show your wo 3. Return only the radioactive "nuclei" to your cup. (You decide what to do with the 2 "decayed nuclei," or those with the marked side up.) 4. Continue this process until there are no radioactive "nuclei" left. Add more rows to your data table, if needed. Include this table in the Data section of your report. of your form s indicated bebowl 30 ... 52Preview File Edit View Go Tools Window Help 79% Sat 2:43 PM Q O Lab 13 Radioactivity Lab Questions.pdf (page 2 of 4) Q Search Lab 13 Radioactivity Lab Question... PHY 1 12 Radioactive Decay Shot earning Objectives Toss # (hr) . Estimate the halfthe of rad aactwy. and dadaminat Number of Radioactive Nuclei Toss # (hr) Number of Radioactive Nuclei 3.27 PM 0 meetus of an atom This radiation may take on the form of ligh energy gamma ray photons. 9 may be cause of and route melting productis salad the daughter botops Hu caughtbe time can be predicted from's of parentisotopes left in a 10 N = Nel where No is the original number of parent ia chopes at Simat = 0,e = 2718. and of to 20.gas 7% when hat the sample remains the meat is to =(h 2/A 1= 0693/ tes . The decay cors batt can be thought of as arazo. since itis in write of 2 Shot 11 rate is 3.33 PM Materials 12 13 14 VOU A W 15 16 Procedure 8 17 Beganbrewedzarif Mo cacke what to a. with the Number of Radioactive Nude Toss 5 010) Number of Radondive Nucki Analysis (show your work in the Calculation, Graph and Error Analysis sections Analysis (show your work 2 of your farm nidcated bebowl 30 OPreview File Edit View Go Tools Window Help 79% Sat 2:43 PM Q O Lab 13 Radioactivity Lab Questions.pdf (page 4 of 4) Q Search Lab 13 Radioactivity Lab Question... Shot 1. What shape (function) does the graph seem to follow? Does it agree with the expected 3.27 PM theory for radioactive decay? Shot if your formal report as indicated bebowl 3.33 PM 2. If you started with a sample of 600 radioactive nuclei, how many would remain undecayed after three half-lives? Shot into your report in the Graph s ec for " the toma nun 3.38 PM from the d for 5) hold dual har les davison hits mid average hafans whoe and putin percentage fam. What might unstones a brief paragraph on Shot 3 3. How many half-lives would it take for 6.02 x 1023 nuclei to decay to 6.25% (0.376 x 3.43 PM 1023) of the original number of nuclei? Your in pressions for the lab in the Impressions and Questions section of your 2. "xvganed with a suit, stego rasoactive nuds. how How, of media ormore x 190 muchail to decay to $25% (0378x 4. Is there any way to predict when a specific piece of candy will land marked side up or "decayed?" If you could follow the fate of an individual atom in a sample of radioactive material, could you predict when it would decay? Explain. References 4 30 OPreview File Edit View Go Tools Window Help 79% Sat 2:44 PM Q O Lab 13 Radioactivity Lab Questions.pdf (page 4 of 4) Q Search Lab 13 Radioactivity Lab Question... 4. Is there any way to predict when a specific piece of candy will land marked side up or Shot "decayed?" If you could follow the fate of an individual atom in a sample of radioactive 3.27 PM material, could you predict when it would decay? Explain. Shot if your formal report as indicated bebowl 3.33 PM 5. Strontium-90 has a half-life of 28.8 years. If you start with a 10-gram sample of strontium-90, how much will be left after 115.2 years? Justify your answer. Shot into your report in the Graph s ec for " the toma nun 3.38 PM from the d for 5) hold dual har les davison hito aid average harare whoe and put in percentage fam. Vihe might Remember to summarize your results against the theory in the Results and unstones a brief paragraph on Interpretation section, include an Error Sources and Concluding Remarks section, and provide a reference list to complete your paper. Shot 3 3.43 PM References You in pressions for the lab in the Impressions and Questions section of your Activity: Radioactive Decay: A Sweet Simulation of Half-Life, sciencenetlinks.com website. American 2. "xvganed with a suit, stego rasoactive nuds. how Association for the Advancement of Science Accessed August 29, 2015 How, edwardwaymore x 190 muchi to decay to $25% (0378 x References 4 30