What is the half-life for cesium?
Table of Contents
What is the half-life for cesium?
30 years 70
Half Lives
| Isotope | Physical Half-Life | Biological Half-Life |
|---|---|---|
| Cesium (Cs-137) | 30 years | 70 days |
| Cs-134 | 2 years | 70 days |
| Iodine-131 (I-131) | 8.1 days | 138 days |
| Sr-90 | 28 years | 18,000 days |
How do you calculate the half-life of cesium 137?
놀를 = Page 2 [2] (5 points total) The half-life of cesium-137 is 30 years. Suppose we have 100-mg sample. a) (2.5 points) Find a formula for the mass remaining after t years. Plt) = cekt p(30)=50 by half-life c=100.
What is the half-life of Cs 134?
∼2 years
The half-life of 134Cs is ∼2 years and that of 137Cs is ∼30 years.
Does caesium have isotopes?
There are several radioactive isotopes of cesium ranging from cesium-114 to cesium-145. The radioactive isotopes have a wide range of half-lives ranging from about 0.57 seconds (cesium-114) to about 3X10+6 years (cesium-135).
What is meant by half-life of an isotope?
Half-life is the length of time it 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.
What is the half-life of germanium 66?
List of isotopes
| Nuclide | Z | Half-life |
|---|---|---|
| Excitation energy | ||
| 66Ge | 32 | 2.26(5) h |
| 67Ge | 32 | 18.9(3) min |
| 67m1Ge | 18.20(5) keV | 13.7(9) μs |
What is the half-life of cesium 142?
1.684 seconds
Cesium
| Mass Number | Half-life | Decay Mode |
|---|---|---|
| 141 | 24.84 seconds | Beta-minus Decay |
| Beta-minus Decay with delayed Neutron Emission | ||
| 142 | 1.684 seconds | Beta-minus Decay |
| Beta-minus Decay with delayed Neutron Emission |
How many isotopes are in cesium?
40 isotopes
Cesium (Cs, atomic number 55) is an alkali metal having 40 isotopes, ranging in mass from 112 to 151.