Problem: Y-85 undergoes positron decay. What is the product nucleus? Enter your answer using thesame format, i.e, symbol-mass numbera. Zr-85b. Sr-85c. Zr-86d. Sr-86e. Y-86

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We are being asked to identify the product nucleus when Y-85 undergoes positron decay.


Heavy (large atomic mass) elements undergo radioactive reactions  (nuclear reactions) in order to increase the stability of their nuclei. 

• In a radioactive decay or emission reaction:

the radioactive particle is ejected from the nucleus
forms a product.  

• A positron emission 

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Problem Details

Y-85 undergoes positron decay. What is the product nucleus? Enter your answer using the
same format, i.e, symbol-mass number

a. Zr-85
b. Sr-85
c. Zr-86
d. Sr-86
e. Y-86

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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 Positron Emission concept. If you need more Positron Emission practice, you can also practice Positron Emission practice problems.