# Carbon 14 dating millions dating e mail ru

Now, when I did that, I made a pretty big assumption, and some you all have touched on this in the comments on You Tube on the last video, is how do I know that this estimate I made is based on the assumption that the amount of carbon-14 in the atmosphere would have been roughly constant from when this bone was living to now?

And so the question is, is the amount of carbon-14 in the atmosphere and in the water, and in living plants and animals, is it constant?

decay or the rate of other cumulative changes in atoms resulting from radioactivity. The various isotopes of the same element differ in terms of atomic mass but have the same atomic number..

One half-life is the amount of time required for of the original atoms in a sample to decay.

Following death, however, no new carbon is consumed.

Progressively through time, the carbon-14 atoms decay and once again become nitrogen-14.

Each original isotope, called the parent, gradually decays to form a new isotope, called the daughter.

Isotopes are important to geologists because each radioactive element decays at a constant rate, which is unique to that element.Geologists often need to know the age of material that they find.They use absolute dating methods, sometimes called numerical dating, to give rocks an actual date, or date range, in number of years.Over the second half-life, of the atoms remaining decay, which leaves of the original quantity, and so on.In other words, the change in numbers of atoms follows a geometric scale as illustrated by the graph below.other carbon isotopes in the same ratio as exists in the atmosphere.