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What percentage of the original quantity of Berkelium-60 do you expect to find in an object that is 480 years old when The radioactive isotope Berkelium-60 has a half-life of 120 years.?
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What is the percentage of radioactive nuclei left after 3 half lives have passed?
12.5%
How old is a fossil that has a radioactive material with a half life of 200 years if there is 25 percent of the original radioactive material left?
400 yrs
An artifact is found that some are claiming is 30000 years old 3.1 percent of the original carbon14 is present The halflife of carbon14 is 5730 year?
Yes, but the dating is only off a little (500 years or so).
Is it true that radioactive dating means putting everything in proper sequence?
No. It means finding out the date something was created or died or placed by comparing the amount of certain radioactive isotopes to those expected of an original object before death or placement.
How much parent material will be left after five half-lives?
Only 1/32 of the original radioactive material will remain. (½)5 = 1/32
How do you determine the half life of a radioactive substance that has changed through radioactive decay After 40 days the original substance left is is one sixteenth of the original amount?
the halflife is 10 days
What is the percentage of radioactive nuclei left after 3 half lives have passed?
12.5%
How is radioactive decay used to determine the absolute age a rocks?
The basic idea is to measure the amount of the radioactive isotope, and of one or more of its decay products. The older the rock, the larger the percentage of the original isotope that decayed - so the ratio between the original isotope and the decay product changes over time.
The original sample of a radioactive substance?
Yes, and the question is ... ?
What is the loss percentage?
It is the percentage decrease of an item from its original value. It is worked out as: (original value-loss)/original value times 100 = percentage loss.
How old is a fossil that has a radioactive material with a half life of 200 years if there is 25 percent of the original radioactive material left?
400 yrs
How do you find loss percentage?
(New amount - Original amt) / Original amount = loss percentage. saurabh K.
How is radioactive decay useful in dating rocks and minerals?
Radioactive decay has a constant rate of change, therefore it con be used to somewhat accurately tell the age of an object if you work backwards through the use of half-lifes (half of the existing radioactive material decays, leaving half of the original in its original form)
What types of elements are useful for dating materials?
Radioactive elements are used to date the age of rocks. Radioactive elements decay according to a known pattern. Scientists can use the elements of that pattern to determine when the rock with the original radioactive element was formed.
The atom that remains after a nucleus disintegrates is what?
smaller than the original atom and possibly radioactive
In a nuclear disintegration the particle that is ejected may be?
It is smaller than the original atom and is possibly radioactive.
What is the stable isotope that is formed by the breakdown of a radioactive isotope?
That's called a daughter isotope, or a daughter product. (The original isotope that decayed is the parent isotope.)
