What is the half-life of uranium 234?
about 25 thousand years
The half-life of uranium-238 is about 4.5 billion years, uranium-235 about 700 million years, and uranium-234 about 25 thousand years.
What is the half-life of potassium-40?
The half-life of potassium-40 that decays through beta emission is 1.28 × 109 years, however the half-life of potassium-40 that decays through positron emission is 1.19 × 1010 years.
What is the half-life of iodine 131?
Because of its relatively short half-life (eight days), iodine-131 is probably not the most hazardous fallout isotope; yet, excessive amounts of radiation from…
What is the formula for calculating half life?
For a zero-order reaction,the mathematical expression that can be employed to determine the half-life is: t1/2 =[R]/2k
What is the equation for half lives?
Mathematically, the half life can be written in terms of the decay rate: Half-life = – ln(2) / k. The natural logarithm (ln) is a mathematical function that is the inverse to the exponential (e) function. You can find the natural logarithm on a scientific calculator where it will be labelled “ln.”.
What is the half life of radioactivity?
The measurement of half-lives of radioactivity in the range of seconds to a few years commonly involves measuring the intensity of radiation…. The radioactive isotope cobalt-60, which is used for radiotherapy, has, for example, a half-life of 5.26 years.
How do you solve half life math problems?
Multiply both sides by t1/2{\\displaystyle t_{1/2}} and divide both sides by the entire left side to solve for half-life. Since there are logarithms in the final expression, you’ll probably need a calculator to solve half-life problems.