Unit 4 Assignment Lesson 4.1 Assignment 1. Discuss the main features of Bohr model of the atom. How is it used to explain the spectrum of hydrogen? What is its major drawback? How does the quantum mechanical model overcome this drawback? 2. Write a brief account of the merits and demerits of nuclear energy as a source of producing electricity. 3. What does nuclear non-proliferation means? Why is it important that we limit the development and use of nuclear energy for the survival of human civilization