Half Life Virtual Lab 8.03 & 8.04
Go to the following website after you have downloaded the lab report:
http://glencoe.mheducation.com/sites/0078778115/student_view0/unit5/chapter14/virtual_lab.html
Please submit to the dropbox 8.04
- Purpose: To investigate the meaning of radioactive half0life as you see a simulation of the radioactive decay of isotopes of four hypothetical elements. To collect radioactive decay rate data over a period of 20,000 years. To determine, compare and contrast half-lives of the 4 radioactive elements.
- Procedure:
- Click the Video button and watch the video to review about atoms.
- Select Element at from the pull-down menu. At first you will see a total of 100 radioactive atoms on the screen.
- Click the Years passed button to advance the time 1000 years.
- Click the Count the Remaining Radioactive Atoms button to see how many radioactive atoms remain.
- Click the Remove the Atoms No Longer Radioactive button to remove the daughter elements
- Record the number of remaining radioactive element in the data table.
- Continue to advance the time by 1000 year intervals until Half of the original atoms remain.(You may be a little below 50 atoms)
- Repeat these steps for the 3 remaining elements. Record results in data chart.
- Data Chart
Years | Element A Remaining Atoms | Element B Remaining Atoms | Element C Remaining Atoms | Element D Remaining Atoms |
0 | 100 | 100 | 100 | 100 |
1000 | ||||
2000 | ||||
3000 | ||||
4000 | ||||
5000 | ||||
6000 | ||||
7000 | ||||
8000 | ||||
9000 | ||||
10000 | ||||
11000 | ||||
12000 | ||||
13000 | ||||
14000 | ||||
15000 | ||||
16000 | ||||
17000 | ||||
18000 | ||||
19000 | ||||
20000 |
- Analysis Questions
- According to your data, what are the approximate half-lives of the 4 elements? A___________ B____________ C__________D___________
- Which of the 4 substances you investigated would be the most harmful to living organisms?
- What part of an original isotopes’ number of atoms remains after 2 half-lives?
- How much of a 100.0g sample of Au-198 is left after 8.10 days if its half-life is 2.70 days?