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Calcalate the half life of cesium- 135 if seven- eighths of a sample decay in 6 times ten to the sixth years?
Wiki User
∙ 14y ago
you know that the half life is 32.2 min and th fration is 3/4 what you do first is that you subtract 1 from 3/4 so you get 1/4 next you know that 1/2 is amout of sample remaining after on whole life so 1/2 multiplied by 1/2 is 1/4 so there are 2 half lifes so than you multiply 2 by 32.2 and you get 64.4 minutes and that is you answers hope that helps.....
Wiki User
∙ 15y ago
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Determine the amount of time it takes for three fourths of a radioactive sample of an isotope of bromine to decay the half-life of the isotope is 16.5 hours?
About 33 hours
How much of a 400-gram sample of K40 is left after 2 half-lives?
After the first half-life, you will have one half of the starting amount. After a second half-life period, you'll be down to one quarter. Of the part that radioactively decays, about 11% of it will decay to 40Ar, and the remainder to 40Ca. Of your total sample of ordinary potassium, only 0.012% will be 40K. The half-life of 40K is about 1.3x109 years.
What is the source of heat in the Earth's interior?
The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.The decay of radioactive isotopes.
What is the formula of half life period?
= 0.693 / T1/2 Nt = N0e(-lt)where N0 is the starting number of nuclei, Nt is the number of nuclei remaining after timet, l is the decay constant, and e = 2.718. The units for the decay constant would be s-1 (or sometimes expressed in disintegrations per second) if the half-life is expressed in seconds. This relationship expresses radioactive decay based on statistics and probability, from an examination of the behaviour of a large number of individual situations. Note that it does not give any indication when a particular nucleus will undergo decay, but only the amount of time needed for a certain proportion of the nuclei in the sample to decay.
What is the type of radioactive decay in which positive particles are given off?
It's called alpha-decay. The two protons and two neutrons are removed in the form of alpha particles, or helium nuclei.
How much cesium would remain from a 10 g sample after 4 years?
As you did not specify an isotope of cesium, I will assume you meant natural cesium. Natural cesium is not radioactive so it does not decay. There will always be the same 10 g of cesium, no matter how long you wait.
What is the parent radioisotope if a beta decay produces barium-137?
Cesium-137
A substance is the time required for half the atoms in a sample of a radioactive isotope to decay?
The time it takes for half the sample to decay is called the half-life.The time it takes for half the sample to decay is called the half-life.The time it takes for half the sample to decay is called the half-life.The time it takes for half the sample to decay is called the half-life.
What does the half life of a radioisotope correspond to?
The length of time required for half of a sample of radioactive material to decay
As the temperature of a radioactive sample increases the rate of the nuclear decay?
It stays the same. Temperature has no effect on the rate of nuclear decay.
What does the half life of a radioisotope represent?
It tells what fraction of a radioactive sample remains after a certain length of time.
If a half life is 2000 years will a large amount of this radioactive sample be around for a long time?
Half-life of 2000 years means that after 2000 years, half of the sample will decay - so of course the other half of the sample is still around.Half-life of 2000 years means that after 2000 years, half of the sample will decay - so of course the other half of the sample is still around.Half-life of 2000 years means that after 2000 years, half of the sample will decay - so of course the other half of the sample is still around.Half-life of 2000 years means that after 2000 years, half of the sample will decay - so of course the other half of the sample is still around.
How long will it take for three-fourths of a sample of caesium-137 to decay?
It will take two half-lives or about 60.34 years for three-fourths of a Cs-137 sample to decay.
What do we call the time it takes for half of a radioactive sample to decay?
The time it takes for half of a sample to decay is called the "half-life" of the corresponding material.
Is it true that The length of time required for half of the radioactive atoms in a sample to decay is its period?
It's period of half of decay.
What is the result of cesium-137 undergoing beta-minus decay?
Beta minus decay emits a positron so a proton is changed to a neutron in this process. This means that caesium 137 decays to Xenon 137
How long did it take for xenon to decay into cesium?
Most isotopes of Xenon are stable and so do not decay. The shortest lived isotope has a half life of more than 10^16 (10 quadrillion) years.
