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  nuclear chemistry...most imp pts...   Awaiting Review for Nickels
Tagged with:       [Post New]posted on 4 Nov 2007 23:13:41 IST    
some points on Nuclear Chemistry

1)Nuclear radius
r = Ro .A1/3.....Ro = 1.4 x 10-15 and A = mass no. of the atom



2) Disintegration constant 
= (2.303/t)log (No)/N

No = no. of atoms initially present , N =
atoms left after time t


3)Activity of a radioactive element =
N..


4)For radioactive decay - N = No e^(-/t)


5)Half life t1/2 = 0.693/
as we all know..

but average life = 1.44 * t
1/2


6) 1 curie = 3.7 x 1010 d/s , 1 becquerel = 1 d/s , 1 rutherford = 106d/s



7)For any nuclear rxn , sum of atomic no. and mass no. on both the sides are equal...


8)Mass defect = M' - M


M = actual isotopic mass , M' = Z(mp + me) + (A-Z)mn


9)Binding energy/nucleon = Binding energy calculated frm mass defect/mass no.



10)PACKING FRACTION = [(isotopic mass - mass no.)/mass no.]*104


11)To calculate geological dating (IIT qs 1ce)


first calculate
  by using , = 0.693/t1/2

2)then calculate uranium converted into lead

3)calculate total amt of uranium initially present

4)apply t = (2.303/lamda).No/N


12)For calculation of carbon dating (AGAIN IIT qs)

i)calculate lamda frm t1/2

ii) m% activity of C-14 now present means N/No = m/100

iii)apply t = (2.303/lamda) log No/N

u will get the answer...


HOPE THESE POINTS HELP U :) :)

ALL THE BEST...
About the Author:
chimanshu_007 (11349)

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Olaaa!! Perrrfect answer. 2087  [2544 rates]

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 this article: 49 points  (with Olaaa!! Perrrfect answer.   in 11 votes )   [?]
 
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srini
srini is offline comment by srini    (posted on 4 Nov 2007 23:18:05 IST)
Hey,
excellent.btw not gettin your pics.(there is a redcross mark over the pics)
chimanshu_007
chimanshu_007 is offline comment by chimanshu_007    (posted on 5 Nov 2007 12:44:29 IST)
its lamda...sorry....
shine
shine is offline comment by shine    (posted on 5 Nov 2007 14:34:38 IST)
gud job.........'ll surely help :) :) :) :)
ritu_007
ritu_007 is offline comment by ritu_007    (posted on 5 Nov 2007 19:49:36 IST)
yaa it'll help.......
swati.07
swati.07 is offline comment by swati.07    (posted on 5 Nov 2007 21:44:00 IST)
gud work
chimanshu_007
chimanshu_007 is offline comment by chimanshu_007    (posted on 5 Nov 2007 23:45:32 IST)
thanx...
anonymous1
anonymous1 is offline comment by anonymous1    (posted on 14 Nov 2007 13:43:28 IST)
nice..
lalkrishnaram
lalkrishnaram is offline comment by lalkrishnaram    (posted on 14 Nov 2007 13:58:05 IST)
thank u good jod
vaish_jee
vaish_jee is offline comment by vaish_jee    (posted on 14 Nov 2007 16:49:25 IST)
thanx
Greatdreams
Greatdreams is offline comment by Greatdreams    (posted on 15 Nov 2007 19:22:39 IST)
thanks for ur gud work again
chimanshu_007
chimanshu_007 is offline comment by chimanshu_007    (posted on 28 Nov 2007 13:41:43 IST)
:) :) :) :) :)
dream_iit
dream_iit is offline comment by dream_iit    (posted on 5 Dec 2007 20:22:37 IST)
great
rockey
rockey is offline comment by rockey    (posted on 5 Dec 2007 20:33:05 IST)
TOO GOOD
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