Do the results support our guess that odd-odd isotopes are

Question

1 Calculate the binding energies per nucleon for the isotopes ₅B¹⁰, ₆C¹², ₇N¹⁴ and ₈O¹⁶. Do the results support our guess that odd-odd isotopes are in a lower class of stability than even-even isotopes?

Data: Atomic masses in amu.

e   0.000549      p   1.007276

  n   1.008665       ₅B¹⁰    10.012938    ₁₁Na²²    21.994435

₁H¹   1.007825       ₆C¹²    12.000000     ₁₅P³²    31.973908

  ₁H²   2.014102     ₇N¹⁴    14.003074      ₂₆Fe⁵⁶    55.934939

  ₁H³   3.016049     ₈O¹⁶    15.994915    ₈₈Rn²²² 222.017574

₂He⁴   4.002603    ₁₀Ne²²    21.991384    ₈₈Ra²²⁶ 226.025406

2. You are supplied with a sample containing 7.5 µg of the isotope I¹³¹. Given the decay constant of this isotope is 9.96 ´ 10^-7 s^-1, find

  i)  the half life of the sample.

ii)  the activity of the sample.

  iii)  the activity of the sample in threeweeks time.

  iv)  if, in legal terms, the sample is radioactive (I¹³¹ is legally defined as a radioactive substance if it has an activity greater than 40 kBq.) If it is, how long will it remain so?