Problem: Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope uranium-235. The of is 28.8 yr. What percentage of a strontium-90 sample remains after 75.0 yr?

FREE Expert Solution

We’re being asked to determine what percentage of a strontium-90 sample remains after 75.0 yr.


Recall that radioactive/nuclear decay of isotopes follows first-order kinetics, and the integrated rate law for first-order reactions is:


ln[N]t = -kt + ln[N]o


where:

[N]t = concentration at time t

k = decay constant

t = time

[N]0 = initial concentration.


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Problem Details

Strontium-90 is a byproduct in nuclear reactors fueled by the radioisotope uranium-235. The of is 28.8 yr. What percentage of a strontium-90 sample remains after 75.0 yr?

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the First Order Half Life concept. You can view video lessons to learn First Order Half Life. Or if you need more First Order Half Life practice, you can also practice First Order Half Life practice problems.

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Based on our data, we think this problem is relevant for Professor Wojcinski's class at OREGONSTATE.