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If a radioactive isotope had a half - life of 1 billion years how much of it would be left after 2 billion years?
1/4: Half would be gone after a billion years and half of that would be gone in another billion years. 1/4: Half would be gone after a billion years and half of that would be gone in another billion years. 1/4: Half would be gone after a billion years and half of that would be gone in another billion years.
What would cause your left arm to cramp as well as the fingers of the left hand?
waht can cause my left arm to cramp and numbness in my left fingertips
How many years did an apprentice serve his master to learn a trade?
7 years. They had to sign a contract and if they left before the end of it they could be arrested.
How many days are left in destroying of earth?
2 years, Watch the movie 2012 and you will know!
Which layer of the heart enlarges to athletes?
Left ventricle is not a layer, dip head! The appropriate answer would be the myocardium.
What percent of carbon14 is left after 5 half-lives?
3.125% would be left over.
What A part time house cleaner made 9258.13 last year if he claimed himself as an exemption for 3650 and had 5700 standard deduction what was his taxable income last year?
you would have no money left
What two things must scientist measure to find the absolute age of a rock?
scientists use carbon14 and potassium argon to find absolute age of rock
How can radioisotopes determine the age of objects?
answ2. Radioisotopes decay at a rate specific to the particular element (and its isotope). Carbon for example has two stable isotopes (C12 and C13), and another half-dozen or so of short-lived ones. C14 is a natural isotope with a half-life of around 5700 years, and is very useful for dating archaeological remains.Tin for example has ten stable isotopes, and up towards 20 radioactive ones.Many other isotopes are used for dating different items, and some even have half-lives in excess of the age of the Earth. For many purposes these may considered as stable.Reverting to the carbon, after 5700 years, there is one-half of the C14 left that there was previously. After 11 400 years there would be a quarter of the original quantity and so on.
How much uranium-238 would be left after 4500000000 years?
Since that is close to its half-life, about half the original quantity will be left.
If a pile of junk was left on the floor for billions of years would it turn into a plane?
.....Probaly Not
How much would 500 invested at 9 interest compounded annually be worth after 4 years?
Left alone, that investment would be worth 705.79 after four years.
The half-life of C14 is 5730 years. What fraction of the original C14 would you expect to be present in a fossil that is 28650 years old?
There would be 1/32 left.
If a radioactive material has a half-life of 10 years what fraction of the material will remain after 30 years?
One eighth would be left.
Why would a radioactive element need to have a rate of decay in order for it to be useful as a dating tool?
Suppose a scientist has the remains of some animal that lived hundreds or thousands of years ago. The animal would have incorporated carbon-14 into its bodily tissues only whilst it was alive. After the animal died this carbon-14 would have started to decay radioactively at a known rate. Meanwhile, let us assume for the sake of simplicity that the fraction of carbon-14 around us at any given time is constant. Let us now suppose that the carbon-14 level in the dead animal proves to be about 50% of today's level. You will recognise this as the half-life of carbon-14! 5700 years. What really happens though is that we can't measure (at least we can't easily measure) the amount of carbon-14 in the dead animal. What we can measure is how much radioactivity from carbon-14 can be detected in the dead animal. Knowing that we can calculate how much carbon-14 is left compared to total carbon and therefore how many carbon-14 half-lives have passes since the animal died. (If half of the 14C is gone then the animal died about 5700 years ago, if 3/4 is gone then another 5700 years beyond that have passed, and so on.) Put another way, without knowing the half-life aka as rate of decay we couldn't turn remaining radioactivity into years.
Why would a radioactive element need to have a know rate of decay in order for it to be useful as a dating tool?
Suppose a scientist has the remains of some animal that lived hundreds or thousands of years ago. The animal would have incorporated carbon-14 into its bodily tissues only whilst it was alive. After the animal died this carbon-14 would have started to decay radioactively at a known rate. Meanwhile, let us assume for the sake of simplicity that the fraction of carbon-14 around us at any given time is constant. Let us now suppose that the carbon-14 level in the dead animal proves to be about 50% of today's level. You will recognise this as the half-life of carbon-14! 5700 years. What really happens though is that we can't measure (at least we can't easily measure) the amount of carbon-14 in the dead animal. What we can measure is how much radioactivity from carbon-14 can be detected in the dead animal. Knowing that we can calculate how much carbon-14 is left compared to total carbon and therefore how many carbon-14 half-lives have passes since the animal died. (If half of the 14C is gone then the animal died about 5700 years ago, if 3/4 is gone then another 5700 years beyond that have passed, and so on.) Put another way, without knowing the half-life aka as rate of decay we couldn't turn remaining radioactivity into years.
If a radioactive isotope had a half - life of 1 billion years how much of it would be left after 2 billion years?
1/4: Half would be gone after a billion years and half of that would be gone in another billion years. 1/4: Half would be gone after a billion years and half of that would be gone in another billion years. 1/4: Half would be gone after a billion years and half of that would be gone in another billion years.
