What is the half-life of a radioisotope?A.The amount of time it takes for a radioisotope to get halfway to a stable formB.The amount of time a radioisotope exists as the parent elementC.The amount of time it takes for half of the radioisotope to formD.The amount of time it takes for half of the material to decay
Question
What is the half-life of a radioisotope?A.The amount of time it takes for a radioisotope to get halfway to a stable formB.The amount of time a radioisotope exists as the parent elementC.The amount of time it takes for half of the radioisotope to formD.The amount of time it takes for half of the material to decay
Solution
The half-life of a radioisotope is D. The amount of time it takes for half of the material to decay.
Here's a step-by-step explanation:
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A radioisotope is an unstable form of an element that decays or breaks down to form a stable element. This decay is a random process.
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The half-life of a radioisotope is the time it takes for half of the atoms in a sample to decay.
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For example, if you start with 100 atoms of a radioisotope, after one half-life, you would have 50 atoms left. After another half-life, you would have 25 atoms left, and so on.
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This process continues until the radioisotope has completely decayed to a stable form.
So, the half-life is not about reaching a stable form, or about the time the radioisotope exists as the parent element, or about the time it takes for the radioisotope to form. It's about the time it takes for half of the radioisotope to decay.
Similar Questions
What does the half-life tell about a radioisotope?A.How long it takes a sample to lose half of its neutronsB.How long it takes for half of a sample to decay to another formC.How long it takes for half of the sample to begin to decayD.How long it takes a sample to become completely stable
The half-life of a radioactive substance is best define as:Group of answer choicesThe time it takes for half of the substance to regenerateThe time it takes for a given amount to increase by halfThe time it takes for a given amount to reduce by halfThe time it takes for half the substance to react
radioactive isotope decays with a rate proportional to the original amountof material present. If originally there is 50mg of the material present and aftertwo hours it has lost 10% of its mass, determine the half-life, the time at which itis half its original mass.
The half-life of a radioactive element which has only 1 of its original mass leftafter elapsed of 60 days is:A. 30 days ⃝ B. 20 days ⃝C. 15 days ⃝ D. 12 days
What is the half-life of a 12 g sample of radioisotope that decayed to 6 g in 28 years?A.7 yearsB.28 yearsC.56 yearsD.14 years
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