|Sep24-10, 10:23 PM||#1|
1. The problem statement, all variables and given/known data
Complete the following decay equations by inserting the missing particle or nuclide information. Identify each type of decay.
i) 90?Sr = ?39Y + ? + ?
ii) 22?Na = ??Ne + β+ + ? + energy
iii)24294Pu = ??? + alpha + ?
iv) 235?U = 91?Sr + 141?Xe + ?
v) 0-1e + 0+1e → ?
3. The attempt at a solution
i) 9038Sr = 8939Y + β- + ? this is beta decay.
- note, lost 1 nucleon. is this ? just 1n?
ii) 2211Na = 2010Ne + β+ + ? + energy also beta decay
- note, lost 2 nucleons. is this ? just 21n?
iii) 24294Pu = 23892U + alpha + ? alpha decay
iv) 23592U = 9138Sr + 14154Xe + ? fission?
v) i have no idea.
- Just looking at that, there seems to be an extra ? for each decay equation. in my text throughout theres only the decay pronumeral in the products, not something extra as well. so im not really sure what is meant to go in there?
- Also im not sure about the relevance of the energy is ii) since all of these decays emit energy anyway.
- iv) doesnt look to be any kind of decay, it seems to represent fission. which would make that '?' 31n?
- and v) i have no idea what the result of an electron positron bond is.
|Sep24-10, 11:51 PM||#2|
v) Matter and antimatter combining to result in something that, according to the superscript and subscript, will have no mass and no charge. That tells us what comes out of it.
|Sep24-10, 11:54 PM||#3|
ohhh... becomes 2 neutrinos where a neutrino is a particle with no charge and mass equal to an electron?... that would conserve mass and charge...
and your not sure about the other '?' either?
|Sep25-10, 10:56 PM||#4|
|Sep26-10, 09:19 PM||#5|
just so my thread goes to the top of the list again so more people see it. haha
|Similar Threads for: Radioactive decay|
|radioactive decay||Biology, Chemistry & Other Homework||3|
|Nuclear Chemistry: Kinetics of Radioactive Decay and Radioactive Dating||Biology, Chemistry & Other Homework||1|
|What is the proper use and meaning of "Radioactive decay"? How much decay HAS occured||General Physics||2|
|radioactive decay equilibrium when decay constants are equal||Biology, Chemistry & Other Homework||2|