Predicting the mode of Nuclear Decay

asked by @jankj3 • over 1 year ago • Chemistry • 5 pts

What is the most likely mode of decay for each? (problem 24.20 in Chemistry: The molecular nature of matter and change)

(a) A=238 Z=92 U

(b) A=48 z=24 Cr

(c) A=50 Z=25 Mn

I understand that the decay forUranium is by alpha decay, but How would you distinguish between b) and c)? Both of them have an equal number of protons and neutrons. I know that c) is unstable, compared to b...

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1 answer

Hey there. So here is a graph of the Valley of Stability. Here, we can locate certain radioactive nucleids or radioisotopes. You plug in the numbers given to you by the isotopes (A would be your atomic mass and Z your atomic number). Try this for A, B, and C. For A, you should get Alpha decay. For B and C, you should get Beta decay, since they are in the beta decay section to the left of the valley of stability.

Also good to keep in mind: Any radioisotope with an atomic mass above 200 must go through alpha decay. Hope this helps! Let us know if you have any other questions.

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answered by @sabrina • over 1 year ago