answersLogoWhite

0


Best Answer

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.

User Avatar

Wiki User

โˆ™ 2009-03-29 22:22:04
This answer is:
๐Ÿ™
0
๐Ÿคจ
0
๐Ÿ˜ฎ
0
User Avatar
Study guides
๐Ÿ““
See all Study Guides
โœ๏ธ
Create a Study Guide

Add your answer:

Earn +20 pts
Q: If a radioactive isotope had a half - life of 1 billion years how much of it would be left after 2 billion years?
Write your answer...
Submit
Related questions

If a radioactive isotope has a half life of 1.3 billion years after 3.9 billion years how much of the parent material will be left?

1/8


If the half life of a radioactive isotope is 5000 years how much of the radioactive isotope will be left after 10000 years?

One quarter of what you started with.


What is the similarity of radioactive isotope and radioactive dating?

Radioactive isotopes are used for radioactive dating. For example, you would use radioactive isotope Carbon-14 to date anything under 70,000 years that was once living. Radioactive isotopes decay from their parent isotope to daughter isotope at a constant rate (under any circumstances). The rate at which a parent isotope decays to its daughter isotope is considered one half life. Carbon-14 has a half life of 5730 years and its daughter isotope is Nitrogen-14. In order to determine how old something is you have to find out how much of the parent isotope is present in relation to the daughter.


What is a radioactive isotope of carbon?

Carbon 14 is a radioactive isotope of carbon, having a half life of about 5,730 years.


What radioactive sample would contain the greatest remaining mass of the radioactive isotope after 10 years?

4.0 grams of 60Co


Which radioactive sample would contain the greatest remaining mass of the radioactive isotope after 10 years?

4.0 grams of 60Co


Isotope A has half-life of seconds and isotope B has a half-life of millions of years which isotope is more radioactive?

Isotope A


How are radioactive isotopes used to determine the absolute age of igneous rock?

Answer : When the isotopes decay, scientists can find out how old the rock is depending on the radioactive isotope's half-life. Explanation: Radioactive isotopes are unstable and will decay. For example, when humans die carbon-14 decays. The isotopes will decay into a stable isotope over time. Scientists can tell how old the rock was from looking at the radioactive isotope's half-life, which tells them how long it would take for there to be half the radioactive isotope and half the stable isotope. At the next half-life there will be 25% of the radioactive isotope and 75% of the stable isotope. At the next half life there will be 12.5% radioactive and 87.5% stable. Example: Carbon-14 is a radioactive isotope with a half life of 5,730 years. How old would carbon-14 be when there is 75% carbon-14 in the rock? 75% is half of the time before the half-life, so it would be 2,365 years. Hope this helps. Half life helps scientists find how much the isotope has decayed and the age of the rock.


How are radioactive isotopes used to to determine the absolute age of igneous rock?

Answer : When the isotopes decay, scientists can find out how old the rock is depending on the radioactive isotope's half-life. Explanation: Radioactive isotopes are unstable and will decay. For example, when humans die carbon-14 decays. The isotopes will decay into a stable isotope over time. Scientists can tell how old the rock was from looking at the radioactive isotope's half-life, which tells them how long it would take for there to be half the radioactive isotope and half the stable isotope. At the next half-life there will be 25% of the radioactive isotope and 75% of the stable isotope. At the next half life there will be 12.5% radioactive and 87.5% stable. Example: Carbon-14 is a radioactive isotope with a half life of 5,730 years. How old would carbon-14 be when there is 75% carbon-14 in the rock? 75% is half of the time before the half-life, so it would be 2,365 years. Hope this helps. Half life helps scientists find how much the isotope has decayed and the age of the rock.


Is ac radioactive?

Actinium is radioactive. The Ac-227 isotope has a half life of 21.77 years


A radioactive isotope has a half life of 2 years At the end of 4 years how much of the original isotope remains?

If a radionuclide has a half-life of two years, then there will be 0.25 of it left after four years.


Does plutonium have atleast one non radioactive isotope?

No, it does not. The longest lived isotope, plutonium-244, has a half life of 80,800,000 years.


What is the appropriate radioactive isotope to use to estimate the age of a rock from a rock formation believed to be a billion years old?

Uranium isotopes could be used to date rock of this age if they are present in the rock.


What is the radioactive half life of carbon 14?

Carbon-14 or 14C, which is a radioactive isotope of carbon, has a half life of 5,700 years.


The half-life of a radioactive isotope is?

The time depends on the isotope. The half life of uranium-238 is about 4.47 billion years and that of uranium-235 is 704 million years. The half life is the amount of time during which any given atom of the isotope has a 50% chance of undergoing decay. Seen another way, the half life is the time it takes for half the atoms of an isotope in a mass of that isotope to undergo decay.


Is U-238 a short lived radioactive isotope?

No, it has a half-life* of around 4.468 billion years *A Half-life is the time it takes for the amount of substance undergoing decay to half.


How much cesium would remain from a 10g sample after 4 years?

I suppose that you think to the radioactive isotope Cs-17; After 4 years remain 9,122 g.


Does Sodium have radioactive isotopes?

Sodium does not have naturally occurring radioactive isotopes - as it has only 1 naturally occurring isotope, which has 11 protons and 12 neutrons, and is not radioactive. However, the 18 other known types of sodium isotopes are all radioactive, and sodium-22 (the most stable radioactive sodium isotope) has a half life of 2.6 years.


Which radioactive element has a half life of 4.5 billion years?

Uranium


Which radioactive element has a half-life of 4.5 billion years?

Uranium


The half-life of an element is important for?

The half-life of an isotope is how long it takes for half of the atoms in a mass to undergo radioactive decay. Say you have 40g of an elements isotope with a half-life of one year. After 1 year, there would be 20g of that isotope left, and 20g of a different isotope/element. After 2 years, there would be 10g, and so on...


What is the half life of radioactive isotope?

The half life is the period of time it takes radioactive decay to transmute one half of the isotope present at the start of the period to a different isotope, usually an isotope of a different element. This period of time is different for different isotopes, with known isotope half lives ranging from femtoseconds to many billions of years.


Assuming a parent isotope with a half life equals 4.5 billion years what percentage of the original parents remains after 6.75 billion years have passed?

35%


A radioactive isotope has a half life of 20 years How many grams of a 6 gram sample will remain after 40 years?

1.5grams


How many years will it take for 10g of radioactive uranium to decay into 5g of radioactive uranium?

Depending on the isotope: - for 235U: 7,038.108 years - for 238U: 4,468.109 years etc.