Typically, about 1 3 days of counting time is required. In spite of many uncertainties, this method gives fairly good idea about the age of the sample up to about 60000 years.

## Will all of carbon-14 eventually disappear?

The half-life of carbon-14 is the amount of time it takes for one-half of the original amount to disappear by radioactive decay. After 50,000 years, a fossil wont have any radiocarbon left in it. Carbon-14 will have all disappeared by radioactive decay.

## How long does it take carbon-14 to turn into nitrogen?

5730 years Whereas its cousins take mere minutes or hours to decay, only half of the carbon-14 component of a given substance is gone after 5730 years, having become nitrogen-14.