Laboratory Report Atomic Dating

 Lab Statement Atomic Online dating Essay

Lab Report

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

Isotope

Product

1 / 2 Life

Carbon-14

Nitrogen-14

5730 years

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

Adjusted Standard

First ppm

Remaining ppm

Associated with Standard

Low

Carbon-14

12000

5998

6000

High

Uranium-235

600000

151000

150000

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.

Debra Holt

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.

Activity 2

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.

Formulas:

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

Sample

Carbon-14 ppm

Carbon-12 ppm

Estimated Preliminary Carbon-14

Approximated Age of Specimen

Tree Precious Specimen

1104

294400

1766

1500

Pest Fossil Example of beauty

669

66924

5353. 80

6000

Softball bat Fossil Example of beauty

3385

82600

6608

6000

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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