Calculate the number of nuclei of carbon -14 undecayed after 22,920 years if the initial number of carbon - 14 atoms is 10, 000. The half- life of carbon-14 is 5730 years.

Explanation

To get the time interval in terms of half-life `n=t/(T_(1//2))=(22,920yr)/(5730yr)=4`
The number of nuclei remaining undecayed after 22,920 years.
`N=(1/2)^nN_0=(1/2)^4 xx 10,000 rArr N=625`