What is a half-life simple definition?
Definition of half-life 1 : the time required for half of something to undergo a process: such as. a : the time required for half of the atoms of a radioactive substance to become disintegrated.
What is a half-life * Your answer?
A half-life is the time taken for something to halve its quantity. The term is most often used in the context of radioactive decay, which occurs when unstable atomic particles lose energy. Twenty-nine elements are known to be capable of undergoing this process.
What is a half-life in chemistry?
An interesting and useful aspect of radioactive decay is half-life, which is the amount of time it takes for one-half of a radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by conditions and is independent of the initial amount of that isotope.
What is the definition of half-life quizlet?
Half life definition. the average time it takes for the number of nuclei in a radioactive isotope sample to halve. the radioactivity of a sample always. decreases over time.
What is a sentence for half-life?
Seed in soil has a half-life of 3 months. Results show that CAT-192 appears well tolerated, with a prolonged half-life of around 40 days in healthy volunteers. The terminal plasma half-life in these patients was 3.8 hours.
What is a half-life quizlet?
What is a half-life GCSE physics?
Half-life is the time it takes for half of the unstable nuclei in a sample to decay or for the activity of the sample to halve or for the count rate to halve.
What is a half-life GCSE?
What is the definition of a half-life quizlet?
What is half-life in Physics quizlet?
A half-life is equal to the time required for half the nuclei in a sample to decay. True. The _______ the half-life is the faster the decay rate. shorter.
What is the half-life of an element quizlet?
Explanation. Half-life is the term that refers to the time in which one-half of an unstable atom undergoes radioactive decay.
What is a half-life the time it takes half quizlet?
Half life is the time it takes for the number of nuclei in a radioactive isotope in a sample to halve. If Radium has a half life of 1600 years what does that mean? It means that every 1600 years half of the radium will decay.
What is the half-life of a isotope?
The half-life of a radioactive isotope is the amount of time it takes for one-half of the radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by conditions and is independent of the initial amount of that isotope.
What is a half-life in physics?
Half-life is the time it takes for half of the unstable nuclei in a sample to decay or for the activity of the sample to halve or for the count rate to halve. Count-rate is the number of decays recorded each second by a detector, such as the Geiger-Muller tube.
How do you do half-life?
How to calculate half life? To find half-life: Find the substance’s decay constant. Divide ln 2 by the decay constant of the substance.
What is half-life in chemistry quizlet?
Half-life. The length of time required of half of a given sample of a radioisotope to decay. Radioisotope. Isotope that is radioactive or emits radiation.
What is the definition of a half-life quizlet geology?
What is the scientific definition of half-life? the amount of time over which the number of parent isotopes decreases by half. Two containers hold the same radioactive isotope.
What does half-life mean?
Kids Definition of half-life : the time required for half of the atoms of a radioactive substance to change composition : the time required for half of something to undergo a process: as
How does the half life calculator work?
The half life calculator is a tool that helps you understand the principles of radioactive decay. You can use it not only to learn how to calculate half life, but also the initial and final quantity of a substance or its decay constant.
What is the half life of a radioactive substance?
In physics, a fixed time required for half the radioactive nuclei in a substance to decay. Half-lives of radioactive substances can range from fractions of a second to billions of years, and they are always the same for a given nucleus, regardless of temperature or other conditions.
What is the origin of the half life of an object?
Origin of half-life First recorded in 1905–10; half + life Scientists can estimate the age of an object, such as a rock, by carefully measuring the amounts of decayed and undecayed nuclei in the object. Comparing that to the half-life of the nuclei tells when they started to decay and, therefore, how old the object is.