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# How does radioactive age dating work

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From: nanu900
Category: Germany
Home earth Earth History Geologist Radioactive. Read about How do we know the Age of the Earth? Radiometric dating using the naturally-occurring radioactive elements is simple in concept even though technically complex. If we know the number of radioactive parent atoms present when a rock formed and the number present now, we can calculate the age of the rock using the decay constant. The number of parent atoms originally present is simply the number present now plus the number of daughter atoms formed by the decay, both of which are quantities that can be measured.

## How Carbon Dating Works | HowStuffWorks

Radiometric dating works by determining the ratio of the number of isotopes of an element and the number of isotopes the element it turns into over time. Since the rate at which certain elements decay and turn into different elements is understood, scientists are able to calculate the age of substances. During the formation of the Earth, radioactive elements became embedded in the minerals that make up the Earth's crust. Since many of the minerals seen on a daily basis contain elements that decay over time, scientists can determine the ages of certain types of rocks. The elements embedded in the Earth's crust decay over time because they are very unstable. When these elements decay and turn into other elements, scientists measure the difference between the original element and its decayed form. Since the rates at which these elements are fixed, all that's left to do is find out where the element is in its decaying process.

### How Carbon-14 Dating Works

Radioactive dating works by measuring the percentage of a radioactive isotope present in a sample. Divide the percentage in half again Again divide it in half 6.
Radiometric dating , radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon , in which trace radioactive impurities were selectively incorporated when they were formed. The method compares the abundance of a naturally occurring radioactive isotope within the material to the abundance of its decay products, which form at a known constant rate of decay. Together with stratigraphic principles , radiometric dating methods are used in geochronology to establish the geologic time scale. By allowing the establishment of geological timescales, it provides a significant source of information about the ages of fossils and the deduced rates of evolutionary change.

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