1. How much energy must be supplied to break a single aluminum-27 nucleus into separated protons and neutrons if an aluminum-27 atom has a mass of 26.9815386 amu? How much energy is required for 100.0 grams of aluminum-27? 2. Positron emission from "C, ¿c → 'B + °e , occurs with release of 2.87 x 10"J per mole of "C. What is the mass change per mole of "C in this nuclear reaction? The masses of "B and "C are 11.009305 and 11.011434 amu, respectively 1. Copper(II) acetate containing "Cu is used to study brain tumors. This isotope has a half-life of 12.7 hours. If you begin with 25.0 µg of “Cu, what mass remains after 63.5 hours? 2. lodine-131 is used to treat thyroid cancer. (a) The isotope decays by B-particle emission. Write a balanced equation for this process. (b) lodine-131 has a half-life of 8.04 days. If you begin with 2.4 µg of radioactive 1311, what mass remains after 40.2 days?

1. How much energy must be supplied to break a single aluminum-27 nucleus into separated protons and neutrons if an aluminum-27 atom has a mass of 26.9815386 amu? How much energy is required for 100.0 grams of aluminum-27? 2. Positron emission from "C, ¿c → 'B + °e , occurs with release of 2.87 x 10"J per mole of "C. What is the mass change per mole of "C in this nuclear reaction? The masses of "B and "C are 11.009305 and 11.011434 amu, respectively 1. Copper(II) acetate containing "Cu is used to study brain tumors. This isotope has a half-life of 12.7 hours. If you begin with 25.0 µg of “Cu, what mass remains after 63.5 hours? 2. lodine-131 is used to treat thyroid cancer. (a) The isotope decays by B-particle emission. Write a balanced equation for this process. (b) lodine-131 has a half-life of 8.04 days. If you begin with 2.4 µg of radioactive 1311, what mass remains after 40.2 days?