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posted by  Klittleangel4 on 10/11/2007 10:44:36 AM  |  status: Closed  

what type of decay has taken place?

Course Textbook Chapter Problem
General Chemistry N/A N/A N/A
Question Details:
When U becomes Th, what type of decay has taken place?
 
A. alpha
B. beta
C. gamma
D. positron
 
Thank you!
Karen
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posted by Sara2029 on 10/11/2007 11:28:47 AM  |  status: Live
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Klittleangel4's comment:
"Thank you!"
Response Details:
alpha decay has taken place...
 
u see that the mass number has decreased by 4, and the atomic number has decreased by 2...
this corresponds to a molecule of Helium lost, which is an alpha particle....
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