Laboratory Report Atomic Dating
Atomic Dating Using Isotopes
Answer the following questions about the results of this activity. Record your answers in the containers.
Send your completed laboratory report to your instructor. Don't forget to save your laboratory report to your pc!
Reference: Isotope Half-Life Chart
1 / 2 Life
Potassium -- 40
Argon - forty five
1, 280 million years
Rubidium -- 87
Strontium -8 six
48, 800 million years
Thorium - 232
Lead – 208
13, 010 million years
Uranium - 235
Lead -- 297
704 million years
Uranium -- 238
Lead - 206
4, 470 million years
Activity you – Tuned
Place your computer data from Activity 1 inside the appropriate containers below. Compute the age of the calibration standards using the following information.
Fraction of sample remaining = leftover ppm of sample/initial ppm of test Age of sample = half-life value of isotope X number of half-lives elapsed
Associated with Standard
1 ) Explain in case the instrument appears to be calibrated based upon the data you obtained pertaining to the Low Calibration Standard.
installment payments on your Explain in the event the instrument definitely seems to be calibrated depending on the data you obtained for the Substantial Calibration Normal.
3. Explain which could be the best isotope from the Isotope Half-Life Chart to measure a a few billion year old specimen.
Carbon dating is very useful in mastering to understand all of the changes in our
community, and the alterations that your life has gone through. I have found that using diverse
isotopes aren't always the very best because a few isotopes include very long half lifes. Carbon dioxide 14
seems to be one of the most reliable isotope to date with because it's 12000 years. We are able to move
back and be aware that certain items were probable then.
Place your data from Activity 1 in the suitable boxes beneath. Calculate age the tuned standards using the following info. The initial carbon-14 content of the tree specimen is 6% of the carbon-12 content with the specimen. The original carbon-14 content material of the insect specimen is 8% from the carbon-12 content material of the example of beauty. The initial carbon-14 content of the bat specimen is 8% of the carbon-12 content from the specimen.
Predicted initial carbon-14 content sama dengan % of carbon-12 ppm value (from above) By carbon-12 in specimen/100 Fraction of carbon- 14 remaining in test = staying ppm of sample/initial ppm of sample Age of sample = half-life value of carbon-14 Times number of half-lives elapsed
Estimated Preliminary Carbon-14
Approximated Age of Specimen
Tree Precious Specimen
Pest Fossil Example of beauty
Softball bat Fossil Example of beauty
4. Make clear how you attained the believed initial value of the carbon-14 content.
5. Describe if the age of the each example of beauty is likely an authentic value. You will have to use the web to judge the approximate age of the oldest example of beauty that is feasible for trees, pesky insects, and bats.
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