In the fossil sample, β-decays of the 14C nuclei occur 5.0 decays per second. a) How many 14C nuclei are left in the sample? b) If the sample is 20,000 years old, how many 14C nuclei were originally present in the sample? c) How much energy have decomposition reactions produced in 20 000 years?
In the fossil sample, β-decays of the 14C nuclei occur 5.0 decays per second. a) How many 14C nuclei are left in the sample? b) If the sample is 20,000 years old, how many 14C nuclei were originally present in the sample? c) How much energy have decomposition reactions produced in 20 000 years?
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'Radiocarbon timing'
In the fossil sample, β-decays of the 14C nuclei occur 5.0 decays per second.
a) How many 14C nuclei are left in the sample?
b) If the sample is 20,000 years old, how many 14C nuclei were originally present in the sample?
c) How much energy have decomposition reactions produced in 20 000 years?
The right answers should be: a) 1,3 · 1012, b) 1,5 · 1013, c) 0,33 J
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