0
If a rock sample originally contained 12 g of Uranium-235 how much will be left after 1 half life?
Wiki User
∙ 14y ago
(4,470 ± 0,020).109 years by alpha decay and (8,20 ± 0,10).1015 years by spontaneous fission.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoFor uranium the problem is incorrect because the half lives of natural isotopes is greater. For another unknown isotope approx, 1,6 g.
Wiki User
∙ 7y agoThe amount decreases by half for each half-life, so one quarter remains, i.e. 125 g.
Wiki User
∙ 15y ago1/8
Wiki User
∙ 14y ago6 grams.
Wiki User
∙ 15y ago50 g
Add your answer:
Earn +20 pts
After 36.9 years a sample of hydrogen contains one-eighth the amount it contained originally what is the half-life of the isotope?
The half-life of the isotope is 12.3.
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 happens to the half life as the sample gets older?
The half life of a sample is the time in which the sample decays to half its mass. It depends only on the material(to be exact on its decay constant) and not the quantity .Hence, the half life of the sample remains the same.
As a sample of a radioactive element decays its half-life?
No, the half life remains exactly the same throughout
The half-life of an isotope is the time required for half the nuclei in a sample to?
Half-life is the length of time required for half the atoms in a radioactive sample to decay to some other type of atom. It is a logarithmic process, i.e. in one half-life, there is half the sample left, in two half-lives there is one quarter the sample left, in three half-lives there is one eight left, etc. The equation is... AT = A0 2 (-T/H) ... where A is activity, T is time, and H is half-life.
After 36.9 years a sample of hydrogen contains one-eighth the amount it contained originally what is the half-life of the isotope?
The half-life of the isotope is 12.3.
A uranium235 sample starts with 200 atoms and 700 million years later there are 100 atoms What is the halflife of uranium235?
700 milliion years. The definition of half-life is the period of time during which one-half of the atoms of an element undergo decay into other elements.
Thorium-234 has a half life of about 24 days of a sample that originally contained 100 grams of thorium-234 now only contains 25 grams.what is the age of the sample?
25 grams of Thorium-234
How does halving a sample affect the weight of the sample?
If the sample is homogeneous, then half of its volume has half of its mass and half of its weight.
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.
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.
What happens to the half life as the sample gets older?
The half life of a sample is the time in which the sample decays to half its mass. It depends only on the material(to be exact on its decay constant) and not the quantity .Hence, the half life of the sample remains the same.
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
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.
A whalebone that originally contained 212 grams of C-14 half-life of 5700 years now contains only 53 grams of C-14. How old is the whale bone?
5700 years
How many half-lives would be necessary for a sample of parent isotopes to decay to the point that only one-half of the sample is composed of parent isotope?
One half life.
As a sample of a radioactive element decays its half-life?
No, the half life remains exactly the same throughout
