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21.3 Radioactive Decay
wpshallImage: wpshallSome radioisotopes have very long half-lives,some have very short half-lives. The half-life of some radioisotopes is given in the table below: The earth is about 4.5 × 109 years old. The half-life of uranium-238 is also about 4.5 × 109 years.
Chemistry Tutorial : Half - Life - AUS-e-TUTE
Is this answer helpful?Thanks!Give more feedbackThanks!How can it be improved?How can the answer be improved?Tell us howPeople also askWhat is the half life of a radioactive isotope?What is the half life of a radioactive isotope?The half-life of a radioactive isotope is the time it takes for half of the atoms in a pure sample of the isotope to decay into another element. It is a measure of the stability of an isotope; the shorter the half life,the less stable the atom.Kids - Encyclopedia > Half-lifeSee all results for this questionWhat is the half life of radiation?What is the half life of radiation?Half-life is the length of timeit takes for half of the radioactive atoms of a specific radionuclide to decay. A good rule of thumb is that,after seven half-lives,you will have less than one percent of the original amount of radiation. Click here for a closer look at half life.Radiation Studies - CDC: Properties of Radioactive IsotopesSee all results for this questionWhat is the radioactive isotope?What is the radioactive isotope?radioactive isotope n.An isotope having an unstable nucleus that decomposes spontaneously by emission of a nuclear electron or helium nucleus and radiation,thus achieving a stable nuclear composition.Radioactive isotope | Define Radioactive isotope atSee all results for this questionWhat is the definition of radioisotopes?What is the definition of radioisotopes?Radioisotope: A version of a chemical element that has an unstable nucleusand emits radiation during its decay to a stable form. Radioisotopes have important uses in medical diagnosis,treatment,and research.Definition of Radioisotope - MedicineNetSee all results for this question
List of radioactive isotopes by half-life - Wikipedia
36 rowsTellurium-128's half-life is over 160 trillion times greater than the age of the universe.ISOTOPEHALF-LIFE 10−3 SECONDShassium-2652boron-192meitnerium-2663.4Radon-1964.7See all 36 rows on enpedia
What is the half life of radioisotope - answers
wwwers›Categories›Science›Biology›BiotechnologyThe half life of a radioisotope is the time taken for the number of radioactive atoms to decay to one-half. A free neutron has a half life of 10.6 minutes. The half life of carbon 11 is 20.3 minutes.
Radioactive Half-Life (cont.) - nde-ed
RADIOACTIVE HALF-LIFE (CONTINUED) The rate at which a radioactive isotope decays is measured in half-life. The term half-life is defined as the time it takes for one-half of the atoms of a radioactive material to disintegrate. Half-lives for various radioisotopes can
What does the half-life of a radioisotope indicate?
wwwers›Categories›Science›ChemistryThe half life of a radioisotope is the time taken for the number of radioactive atoms to decay to one-half. A free neutron has a half life of 10.6 minutes. The half life of carbon 11 is 20.3 minutes.
Half-Life of Radioisotopes Chemistry Tutorial - AUS-e-TUTE
Defining the Half-life of a Radioisotope. The half-life of uranium-238 is also about 4.5 × 10 9 years. This means that if a rock contained 100 g of uranium-238 at the time the earth came into being, then at the present time the rock would contain only half that amount, ½ × 100 = 50 g, of uranium-238.
Halflife of a Radioisotope - Lapeer
Halflife of a Radioisotope. Using our estimate of 800 days for the halflife of the example above ( 55Fe ), we would want to run the experiment for about 1600 to 1800 days. If we enter 1600 for the length of the experiment (first experimental parameter) we would want to take readings every 100 days (second experimental parameter).
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