Notes on Atomic Structure For BSc, GE and Entrance Examinations
Notes on Atomic Structure Bohr's Atomic Model In 1913, Niels Bohr brought an atomic model that could manage an excellent balance between classical and quantum mechanical interpretation. A model that could compensate and explain the shortcomings and imperfections in the previous atomic models. The important postulates of the Bohr's atomic model are: 1. The electrons in an atom revolve round the nucleus only in certain permitted circular path called the shells or energy levels or stationary states. 2. Each energy level is denoted with a principal quantum number 'n'. Where n = 1, 2, 3, ..... 3. The shell or energy level closest to the nucleus is denoted with n = 1 or the K shell, the next one with n = 2 or L shell and so on ..... 4. These energy levels are associated with definite amount of energies, given by the formula: E n = -KZ 2 / n 2 where K = 13.6 ev, Z = atomic number and n = number of orbit from the nucle...