Structure of atoms #2 : Electronic Configuration
The arrangement of electrons in the various shells/orbits/energy levels of an atom of the element is known as electronic configuration. Bohr-Bury scheme Electrons revolve around the nucleus in different energy levels or shells and each shell is associated with definite energy. The energy of the K shell is the least while those of L, M, N and O shells increases progressively. We also know that any system that has least energy is the most stable. 1 s t energy level is K shell 2 n d energy level is L shell 3 r d energy level is M shell 4 t h energy level is N shell and so on. Electronic configuration of an element Bohr and Bury Scheme - Important Rules 1. Maximum number of electrons that can be accommodated in a shell is given by 2n 2 where n=shell number For 1 s t energy level, n = 1 Maximum number of electrons in 1 s t energy level = 2n 2 2 x (1) 2 = 2 For 2 n d energy level n=2 Maximum number of...