Radioactive dating and half life worksheet
- Radiometric Dating: Methods, Uses & the Significance of Half-Life
- 22.3 Half Life and Radiometric Dating
- Radioactive Dating: Half-Life & Geologic Time
Radiometric Dating: Methods, Uses & the Significance of Half-Lifeand gay black
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Another approach to describing reaction rates is based on the time required for the concentration of a reactant to decrease to one-half its initial value. This period of time is called the half-life The period of time it takes for the concentration of a reactant to decrease to one-half its initial value. If two reactions have the same order, the faster reaction will have a shorter half-life, and the slower reaction will have a longer half-life.
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22.3 Half Life and Radiometric Dating
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Radioactive Dating: Half-Life & Geologic Time
Unstable nuclei decay. However, some nuclides decay faster than others.
During natural radioactive decay, not all atoms of an element are instantaneously changed to atoms of another element. The decay process takes time and there is value in being able to express the rate at which a process occurs. A useful concept is half-life , which is the time required for half of the starting material to change or decay. Half-lives can be calculated from measurements on the change in mass of a nuclide and the time it takes to occur. The only thing we know is that in the time of that substance's half-life, half of the original nuclei will disintegrate. Although chemical changes were sped up or slowed down by changing factors such as temperature, concentration, etc, these factors have no effect on half-life.