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alpha and beta

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Anirudh The Conquerer
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PostSubject: alpha and beta Tue Mar 10, 2009 4:28 pm

guyz how many alpha and beta particles are emitted when uranium nucleus U(A= 238, Z=92) decays to lead Pb(A=206, Z=82)

guyz now u can find the answer but in the exam if they ask for other elements what can we do at the time how to calculate?
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PostSubject: Re: alpha and beta Tue Mar 10, 2009 6:29 pm

FOR every alpha (A- 4) and (Z - 2)
for every beta A - 0) AND (Z+ 1)
Here,
A1=238, Z1= 92 , A2 = 206, Z2 = 82
A1- A2 = 238 - 206 = 32
=> NO. OF ALPHA EMISSIONS = 32/4 = 8
=> due to this Z should change to Z1 - 2*8 = 92 - 16 = 76.
but Z2 = 82
AS for each beta Z increases by 1,
here increase is = 82- 76 = 6
=> no. of beta emiisions = 6
ans: 8 alpha and 6 beta emissions
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Anirudh The Conquerer
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PostSubject: Re: alpha and beta Tue Mar 10, 2009 8:01 pm

thnx Very Happy Very Happy Very Happy Very Happy
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