1. Calculate the number of alpha particles emitted by 9.6 mg of this nuclide in 2 minutes. The half-life of 235U, an alpha emitter, is 7.1×108yr.



2. In one of the neutron-induced fission reactions of U-235 (atomic mass = 235.043922 amuamu), the products are Ba-140 and Kr-93 (a radioactive gas). What volume of Kr-93 (at 25 ∘C and 1.0 atm) is produced when 1.90 g of U-235 undergoes this fission reaction?



3.

Enter a nuclear equation for the most likely mode of decay for each of the following unstable nuclides.
























a. Kr-74

b. Y-77

c. Ar-44

d. Ar-33



4. Enter the nuclear reaction for the neutron-induced fission of U-235 to form Xe-144 and Sr-90.