(a) A 72-gram sample of natural carbon contains the

Chapter 30, Problem 78GP

(choose chapter or problem)

(a) A $72 \text { - gram }$ sample of natural carbon contains the usual fraction of

${ }_{6}^{14} C$. Estimate roughly how long it will take before there is only one ${ }_{6}^{14} C$ nucleus left.

(b) How does the answer in $(a)$ change if the sample is $340 \text { grams }$? What does this tell you about the limits of carbon dating?

Equation Transcription:

$72-gram$

${\ }_{6}^{14}C$

$340\ grams$

Text Transcription:

72-gram

6^14C

340 grams

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