Half life age dating
The carbon-14 undergoes radioactive decay once the plant or animal dies, and measuring the amount of carbon-14 in a sample conveys information about when the plant or animal died.Learn about different types of radiometric dating, such as carbon dating.
It is incorporated into plants through photosynthesis, and then into animals when they consume plants.For example, if there is just one radioactive atom, and its half-life is one second, there will not be "half of an atom" left after one second.Instead, the half-life is defined in terms of probability: "Half-life is the time required for exactly half of the entities to decay on average".The accompanying table shows the reduction of a quantity as a function of the number of half-lives elapsed.Simulation of many identical atoms undergoing radioactive decay, starting with either 4 atoms per box (left) or 400 (right).
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Half-life is defined as the amount of time it takes a given quantity to decrease to half of its initial value.