What is carbon-14?
Carbon 14 is what a living thing gives off. It helps archaeologists tell how long ago something died (the less carbon 14, the longer ago it died).
Carbon-14 is a specific isotope of the element carbon. It "decays" to another isotope of carbon. Decay begins when the living thing (like a tree) dies. By measuring the percentage of C-14 to regular carbon, they can determine ABOUT how long the item has been dead. Not a precise measurement, it is in hundreds or thousands of years.
The main limitations of using Carbon14 dating to find the age of something that is carbon base are firstly the possibility that carbon may be absorbed by some things making it more difficult to get an absolutely accurate age and secondly, with Carbon14 only having a half life of 5,568 years the maximum theoretical limit for detection is 100,000 years.
Carbon14 has a half-life of 5730 years How long does it take a 200gram sample of carbon14 to decay to a mass of 100 grams?
Carbon14 has a half life of 5730 years How long does it take a 200 gram sample of carbon14 to decay to a mass of 100 grams?
(1) After several times the half-life, the amount of C-14 that remains is so small that it is hard to measure accurately. (2) It is only useful when you can assume that a certain number of years ago, an object got most of its carbon from the atmosphere. This basically restricts it to dating living beings.
The half-life of carbon 14 is 5730 years After 11460 years how much of the original carbon14 remains?
Yes. Well it depends on how much you start with. Numerically the exponential decay curve approaches zero without touching it, but in reality, matter is composed of elemental particles. Consider that at the end of 10 half lives, you had a single atom of Carbon14. So at 9 half lives, there should be 2 Carbon14 atoms. If you keep going, then at the start, you had 1024 atoms. And that is a teeny tiny amount…