Q. A sample of a certain element with two naturally occurring isotopes becomes(adsbygoogle = window.adsbygoogle || []).push({});

activated by neutron capture. After 1 hour in the reactor, it is placed in a

counting room, in which the total number of decays in 1 hour is recorded at

daily intervals. A summary of the recorded data appears below.

From the data, determine the (i) half-lives and (ii) initial activities of the 2

components. (iii) What is the element?

The thing with this question is that you're given a table with the time in one column and the total number of counts in the other column.

I know that if you take the natural log of the exponential decay function that you can find lambda and therefore the half-life.

But you have to find the half-life of two isotopes and I don't know how you can do that.

Any hint that can point me in the right direction would be greatly appreciated :)

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# Homework Help: Half-life question

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