Question

The half-life of carbon-14 is roughly 5,700 years. In the pre-industrial atmosphere, there was approximately one atom of carbon-14 for every trillion atoms of carbon-12. In a fossil that is 17,100 years old, how many atoms of carbon-12 would there be for every atom of carbon-14? Approximately

Select one:

a. three trillion

b. four trillion

c. eight trillion

d. two trillion

e. one trillion

Answer 1

Ans: les 8 trillion The half life of Cry (4 12) - 5700 yeares. of detected fossil (t); the age 17,100 years. The reatio of cru: 62 ( NO.) initially 1 in every 1 treillion (12 atom. Let us. assume that We have Ny reatio of 44:42 at the end of 17.100 yeares . Uring the foremula for carebom dating t- ln (Nf1No) -(0.693) X tiya 171002 en Nf = 6 million) } I treillion X 5700 40-693) on solving: Nfx (a trillion) - Co-693) (7100) 5700 e Nes 00:2076 e-2-074 0.125 1 treillion I treillion 1 trillion I cu atoma in 7.996. treillion Ga atom

I trillion 34 atom have means 0.125 Січ pere (12 atom 8 trillion atom atom in 1 CM

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