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The accession of Asif Jah II, who reigned from 1762 to 1803, ended the instability.
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After viewing the video on carbon dating, use your newfound knowledge to: Did you know…We have over 95 college courses that prepare you to earn credit by exam that is accepted by over 2,000 colleges and universities.You can test out of the first two years of college and save thousands off your degree.Anyone can earn credit-by-exam regardless of age or education level.Scientists often use the value of 10 half-lives to indicate when a radioactive isotope will be gone, or rather, when a very negligible amount is still left.This is why radiocarbon dating is only useful for dating objects up to around 50,000 years old (about 10 half-lives).You might remember that it was mentioned earlier that the amount of carbon-14 in living things is the same as the atmosphere.

Radiocarbon dating is a method used to date materials that once exchanged carbon dioxide with the atmosphere; in other words, things that were living.The half-life is always the same regardless of how many nuclei you have left, and this very useful property lies at the heart of radiocarbon dating. The graph below shows the decay curve (you may recognize it as an exponential decay) and it shows the amount, or percent, of carbon-14 remaining.You will notice that after around 40,000 years (or 8 half-lives), the amount left is starting to become very small, less than 1%.Radioactive carbon-14 is continually formed in the atmosphere by the bombardment of cosmic ray neutrons on nitrogen-14 atoms.After it forms, carbon-14 naturally decomposes, with a half-life of 5,730 years, through beta-particle decay.It is often used on valuable artwork to confirm authenticity.