Electronic Configuration and the Periodic Table

• Bohr's atomic model:
  • Neils Bohr proposed that the electrons present around the nucleus revolve in specific orbits called energy levels.
  •  He also stated that the electrons do not release energy while revolving. Thus, the resulting atom is a stable one.
  • The shells in which the electrons are present are known as K, L, M, N, and so on (or 1, 2, 3, 4, and so on), as proposed by Bohr and Bury.
  • Each shell contains a specific number of electrons, which can be calculated using the formula 2n².