What isotope has a half-life of 6 hours?

technetium-99m
For example, technetium-99m, one of the most common medical isotopes used for imaging studies, has a half-life of 6 hours.

What is half-life period of an isotope?

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 range from a few microseconds to billions of years.

What fraction of an isotope is left after 1 half-life?

Half-lives can be short (less than a second) or very long (billions of years). The fraction of remaining sample of an isotope can be calculated with the formula – -, where n is the number of half-lives that have passed. For example, after 1 half-life, \% of the sample would be left. After 2 half sample would be left.

Which isotope has shortest half-life?

Hydrogen-7 ( about 23x10E-24) has the shortest half life.

What is an isotope half-life quizlet?

definition of half life. the time taken for the radioactivity of a specified isotope to fall to half its original value. a half life of a radioactive substance is. the time it takes to get half its radioactivity to go away.

What do you mean by half-life period?

Half-life (symbol t1⁄2) is the time required for a quantity to reduce to half of its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay or how long stable atoms survive.

What is a short half-life?

Short versus long half-lives Drugs or substances that have a shorter half-life tend to act very quickly, but their effects wear off rapidly, meaning that they usually need to be taken several times a day to have the same effect.

What is the initial value of a radioactive isotope after 30 years?

After simplifying these values, we will get: A radioactive isotope will remain 15.625 grams after 30 years if its half-life is 6 years, and initial values are 500 grams. Similarly, the elapsed time t and the initial quantity N (0) of a radioactive isotope can also be calculated by following the same process.

What is the half life of the radioactive isotope phosphorus-32?

Problem #14:The half-life of the radioactive isotope phosphorus-32 is 14.3 days. How long until a sample loses 99\% of its radioactivity? Solution:

What is the half-life of 200 grams of an element?

So, if an element with the initial value of 200 grams decayed to 50 grams in 120 seconds, its half-life will 60 seconds. Similarly, you can also calculate other parameters such as initial quantity, remaining quantity, and time by using the above equations.

What is the half life of iodine-131 after 210 minutes?

Solution: 210 min / 22.3 min = 9.42 half-lives (210 min is 3.5 hours) (1/2)9.42= 0.00146 (the decimal fraction remaining) 1012x 0.00146 = 1.46 x 109disintegrations per second remaining Problem #19:Iodine-131 has a half-life of 8.040 days. If we start with a 40.0 gram sample, how much will remain after 24.0 days? Solution: