Once the organism dies, it no longer picks up carbon-14 through interaction with its environment.
By measuring the proportion of carbon-14 in the fossilized object, comparing that to the proportion in living material, and using the fact that the half-life of carbon-14 is about 5730 years, the age of the object can be estimated.
if the final amount in the account was ,850, what was the initial amount ?
The method of carbon dating makes use of the fact that all living organisms contain two isotopes of carbon, carbon-12, denoted 12C (a stable isotope), and carbon-14, denoted 14C (a radioactive isotope).
If you have a fossil, you can tell how old it is by the carbon 14 dating method.
This is a formula which helps you to date a fossil by its carbon.
This rather complex formula shows you how to solve this puzzle using accepted scientific methods.
I really need help i don't know what to do for this To see the effect of a realativity small error in estimate of the amount of carbon-14 in a sample being dated, answer the folowing questions about this hypothetical situation. I really need help i don't know what to do for this To see the effect of a realativity small error in estimate of the amount of carbon-14 in a sample being dated, answer the folowing questions about this hypothetical situation. (a) 0.17 = (1 / 2)^( (2000 - x) / 5730) [ ( 2000 - x) / 5730 ] log (1 / 2) = log (0.17) 2000 - x = 5730 log(0.17) / log(0.5) x = 2000 - 5730 log(0.17) / log(0.5) x = - 12648 or 12649 BC.
So with that said, let's go back to the question of how do we know if one of these guys are going to decay in some way. That, you know, maybe this guy will decay this second. Remember, isotopes, if there's carbon, can come in 12, with an atomic mass number of 12, or with 14, or I mean, there's different isotopes of different elements. So the carbon-14 version, or this isotope of carbon, let's say we start with 10 grams. Well we said that during a half-life, 5,740 years in the case of carbon-14-- all different elements have a different half-life, if they're radioactive-- over 5,740 years there's a 50%-- and if I just look at any one atom-- there's a 50% chance it'll decay. Now after another half-life-- you can ignore all my little, actually let me erase some of this up here. So we'll have even more conversion into nitrogen-14. So now we're only left with 2.5 grams of c-14. Well we have another two and a half went to nitrogen. So after one half-life, if you're just looking at one atom after 5,740 years, you don't know whether this turned into a nitrogen or not. Let A be the amount of carbon-14 present at any instant 't'.So, -d A/dt is directly proportional to A d A/dt = -k A,where k is the decay constant.Note: Do not round any numbers during your calculation._____years old If you can please show all steps, thanks for any help!!! The amount of carbon-14 present decreases exponentialy with time.The radioactive element carbon-14 has a half-life of 5750 years.