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Author Question: The half-life of carbon-14 is about 6000 years. Assume that a sample of charcoal formed by burning ... (Read 58 times)

bobbie

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on: Feb 28, 2020

Question 1

When a rock first crystallizes it has unstable isotopes but as of yet no daughter products. After three half-lives, how much total mass has been lost due to decay?
◦ seven-eighths
◦ two-thirds
◦ one-half
◦ none

Question 2

The half-life of carbon-14 is about 6000 years. Assume that a sample of charcoal formed by burning of living wood 15,000 years ago. How much of the original carbon-14 would remain today?
◦ between one-fourth and one-eighth
◦ between one-half and one-fourth
◦ more than one-half
◦ between one-half and one-third
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Marked as best answer by bobbie on Feb 28, 2020

bpool94

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Reply #1 on: Feb 28, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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bobbie

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Reply 2 on: Feb 28, 2020
Excellent

jomama

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Reply 3 on: Yesterday
Gracias!

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