E-Storenuclear chemistry...most imp pts...
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 * t1/2
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...
Comments (13)
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excellent.btw not gettin your pics.(there is a redcross mark over the pics)