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It is 5 times the time of one half-life. Please note that different isotopes have half-lives that vary from a tiny fraction of a second to billions of years, so you can't know how long this is in days, or years, or whatever, until you know what isotope you are talking about.
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After three half lives what fraction of the daughter product has formed?
91.16% of the daughter product has formed after 3.5 half lives.
Why is it necessary for a half- life to be long?
It is not necessary for a half life to be long. Some isotopes have half lives of just a few seconds, or even less.
What fraction of a radioactive sample decays after three half lives?
If I take a radioactive sample of 400 moles of an unknown substance and let it decay to the point of three half-lives I would have 50 moles left of the sample. 1/2 of what is left will decay in the next half-life. At the end of that half-life I will have 25 moles left of the unknown substance or 4/25.
Do radiotracers generally have long or short half-lives?
Radiotracers generally have short half lives. Detection requires a number of decay events. Using material with a short half life means a smaller amount is required and that after the detection the amount of residual radiation is reduced.
How long has californium been around?
The half lives of californium isotopes and isomers are between 45 microseconds to 900 years.
After three half lives what fraction of the daughter product has formed?
91.16% of the daughter product has formed after 3.5 half lives.
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.
How long are butterflies?
For your question there could be two answers . If you meant how long a butterfly lives it is about 2 weeks if you meant actually how long a butterfly is the shortest would be a half a inch to three inches .
How many half-lives have occurred in a rock containing one-fourth parent material and three-fourths daughter material?
2 half-lives have.
What fraction of a sample remains after three half lives?
An eighth remains.
Why is it necessary for a half- life to be long?
It is not necessary for a half life to be long. Some isotopes have half lives of just a few seconds, or even less.
After three half-lives what percent of the radioactive isotope is remaining?
12.5% is remaining.
How long will half and half last once opened?
About three days.
What fraction of a radioactive sample remains after three half-lives?
Not sure what you mean by "had-lives". After 3 half lives, approx 1/8 would remain.
A radioisotope has undergone three half-lives when it has only percent of the original radioactivity?
12.5
If a hen and a half can lay an egg and a half in a day and a half how long shoud three hens take to lay three eggs?
It would take three days as you said!!!!!!!!!!!!!
How long does a beetle live for?
a dung beetle lives 1 and a half years
