2. a) Calculate the mass defect in the 4 He nucleus that has a mass of 4.00150 AMU while the proton mass is 1.00728 AMU and the neutron mass is 1.00867 AMU. b) Calculate the energy equivalent of this mass in J/mol.c) What is more stable- the isolated nucleons or the nucleus?

3. Sketch the graph one obtains when one plots binding energy per nucleon vs atomic number. Indicate the region in which fission is possible and the region in which fusion is possible.Why is fusion so much more difficult than fission to carry out in a controlled manner or 21.57?

4. When comparitively light elements combine to form heavier nuclei, the process is called ________________ and is accompanied by a ____________________ in the total nuclear mass.

5. Complete and balance the following

a) ²⁵²Cf + 10 B = 3 ¹n + ?

b) ¹²²I = ^-122Xe + ?

 
c) ⁵⁹Fe = b +?

d) ²³⁸U = ²⁰⁶Pb + ___ a + ___b

6.  21.19

7.  21.52

8.  21.56

9.  21.57

10. 21.61