Half life and carbon 14 dating
In this way, atmospheric carbon is distributed throughout the web of life until every living thing has the same ratio of C as the atmosphere. Plants and animals tend to favor lighter nuclei just a bit.
Serious technicians know how to compensate for this preference when dating samples.) With a half life of 5730 years, C in a piece of living organic matter will be the same as it is in the atmosphere but larger than in a piece of dead organic material.
If half of the uranium-238 has turned into lead-206 the rock will be 4500 million years old.
Immer wenn ein Lebewesen stirbt, beginnt eine Stoppuhr zu laufen.
About one carbon atom in a trillion (10) contains a radioactive nucleus with 6 protons and 8 neutrons — carbon 14.