PLEASE TYPE TO HAVE A CLEAR UNDERSTANDING (Everything to determine question is here.) 1. balance nuclear equations for: a) The alpha 'emission resulting in the formation of Pa-233. b) The loss of a positron by Y-85 c) The fusion of two C-12 nuclei to give sodium-23 and another particle. d) The fission of Pu-239 to give tin-130, another nucleus and an excess of two neutrons. 2. balance nuclear equations for the bombardment of a) U-238 with a nucleus to produce Fm-249 and five neutrons. b) Al-26 with an alpha particle to produce P-30 c) Cu-63 with hydrogen producing Zn-63 and a neutron. d) Al-27 with deuterium (2/1 H) to produce an alpha particle and another nucleus. 3. Balance the following equations by filling in the blanks. a) 238 92 U + 1 1 H  238 93 Np + b) 241 95 Am + 4 2 He  2 1 0 n + c) 4 2 He +  1 0 n + 12 6 C d) + 27 13 Al  24 11 Si + 4 2 He 4. Yttrium-87 (at.mass = 87.0 amu) has a rate constant of 2.6 x 10-6 s -1 . What is the activity (in curies) of a 5.00-mg sample? 5. Np-237 (at.mass = 237.0 amu) has a half-life of 2.20 x 106 years. This isotope decays by alpha emission. a) balance nuclear reaction for the decay of neptunium-237. b) What is the activity (in millicuries) of a 0.500-g sample of the isotope? 6. Bromine-82 has a half-life of 36 hours. A sample containing Br-82 was found to have an activity of 1.2 x 105 disintegrations/min. How many grams of Br-82 were present in the sample? Assume that there were no other radioactive nuclides in the sample.