Stephanie B
New member
Isotope-StartingAmountinµCµCafter16 daysµCafter 50 days
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first section-Isotope-Half-Life (days) Starting Amount in µC-µCafter16 days- µCafter50 days
Iodine 125 15000
Iodine 131 8 15000
Iodine 131 8 250
Hydrogen 3 15000
Carbon 14 50000
Phosphorous 32 15000
Phosphorous 33 15000
Sulfur 35 15000
Chromium 51 15000
1. Which of these settings should produce the most accurate counting results?
2. Which of the isotopes in the table above would produce the best results when trying to determine the age of something thousands of years old? Why?
3. Why does an ancient cotton garment contain less Carbon 14 than a piece of cotton made last year?
4. Why is C-14 dating NOT useful in determining whether a piece of cotton fabric was made last week or 2 months ago?
5. Why is C-14 dating NOT useful in determining the age of an metal artifact?
6. How are Phosphorous 32 and Phosphorous 33 different other than half-life?
Fill in the graph
first section-Isotope-Half-Life (days) Starting Amount in µC-µCafter16 days- µCafter50 days
Iodine 125 15000
Iodine 131 8 15000
Iodine 131 8 250
Hydrogen 3 15000
Carbon 14 50000
Phosphorous 32 15000
Phosphorous 33 15000
Sulfur 35 15000
Chromium 51 15000
1. Which of these settings should produce the most accurate counting results?
2. Which of the isotopes in the table above would produce the best results when trying to determine the age of something thousands of years old? Why?
3. Why does an ancient cotton garment contain less Carbon 14 than a piece of cotton made last year?
4. Why is C-14 dating NOT useful in determining whether a piece of cotton fabric was made last week or 2 months ago?
5. Why is C-14 dating NOT useful in determining the age of an metal artifact?
6. How are Phosphorous 32 and Phosphorous 33 different other than half-life?