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n200080 [17]
3 years ago
6

What are 3 general rules to predict the stability of an isotope

Chemistry
1 answer:
Mashcka [7]3 years ago
8 0
<span><span>1) Calculate the total number of nucleons (protons and neutrons) in the nuclide
<span>--> If the number of nucleons is even, there is a good chance it is stable.
</span></span><span><span>
2) Are there a magic number of protons or neutrons?
</span>--> 2,8,20,28,50,82,114 (protons), 126 (neutrons), 184 (neutrons) are particularly stable in nuclei.
</span><span>
3) Calculate the N/Z ratio.
<span>--> Use the belt of stability (Figure 1) to determine the best way to get from an unstable nucleus to a stable nucleus</span></span></span>
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The equilibrium equation will be: 
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The square factor for BrCl is due to the 2 coefficient on that side of the equation.  
Now solve for BrCl, substitute the known values and calculate. 
Kc = ([Br2][Cl2])/[BrCl]^2 
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[BrCl] = sqrt(0.043 mol/l * 0.043 mol/l / 0.142) 
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Rounding to 3 significant figures gives 0.114 mol/l
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