Question

Give Bohr-Bury scheme for filling of electrons.

Answer 1

Bohr-Bury scheme

• Bohr-Bury scheme describes the method to fill the electrons in various energy levels/ shells/ orbits i.e K,L,M, and N shell.
• According to Bohr-Bury scheme, electrons are first filled in lowest energy level i.e K shell, then L shell and so on.
• Energy of various shells - K<L<M<N
• Maximum number of electrons that can be filled in a shell is given by the formula 2n².

For example, K shell = 2n² = 2 (1)² = 2 electrons

L shell = 2n² = 2 (2)² = 8 electrons

M shell = 2n² = 2 (3)² = 18 electrons

N shell = 2n² = 2 (4)² = 32 electrons

• Electrons revolve around the nucleus in a fixed orbit and each orbit has a certain limit on number of electrons.
• It also states that the electron will not gain or lose energy till it is revolving in the same shell.