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Topic: Nuclear chem problem  (Read 12552 times)

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unleash10

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Nuclear chem problem
« on: June 09, 2006, 08:09:44 PM »
 147 62 Sm decays by a-emission. Write an equation for the reaction. The atomic mass
is 146.9146 amu. Calculate the energy associated with the reaction in MeV.

Ok So i know Sm will decay to 143 60 Nd and 4 2 He.

My question is how do I find out the mass of Nd of that isotope? It is not listed in any tables in my book.
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Offline pantone159

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Re: Nuclear chem problem
« Reply #1 on: June 09, 2006, 10:06:20 PM »
My CRC (71st ed) table of the isotopes gives the mass of 143 Nd as 142.909810 amu.
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unleash10

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Re: Nuclear chem problem
« Reply #2 on: June 10, 2006, 02:31:39 AM »
The thing is, my teacher gave this as a homework problem, and didnt give the atomic mass of the isotope of Nd but he gave the atomic mass of Sm. So the only way to find out is through a table?
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Offline Mitch

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Re: Nuclear chem problem
« Reply #3 on: June 10, 2006, 01:30:09 PM »
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Offline sdekivit

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Re: Nuclear chem problem
« Reply #4 on: June 11, 2006, 04:13:44 PM »
you know the mass of an a-particle right ???
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Offline pantone159

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Re: Nuclear chem problem
« Reply #5 on: June 11, 2006, 05:08:27 PM »
Quote from: unleash10 on June 10, 2006, 02:31:39 AM
So the only way to find out is through a table?

Yep.  Other than doing the same experiment that the people who made the table did.
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Offline Mitch

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Re: Nuclear chem problem
« Reply #6 on: June 11, 2006, 05:41:47 PM »
 
Quote from: Mark K on June 11, 2006, 05:08:27 PM
Yep.  Other than doing the same experiment that the people who made the table did.


Yeah, making a mass spec. from scratch could be more difficult than looking it up in a table.
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