What do you understand by the term electronic configuration? State Bohr- Bury's scheme of electronic configuration.
What do you understand by the term electronic configuration? State Bohr- Bury's scheme of electronic configuration.
Electronic configuration: Electronic configuration is the distribution of electrons in the various energy levels around the nucleus of an atom.
Two scientists Neils Bohr and Charles Bury gave some rules to distribute the electrons and called as Bohr-Bury scheme:
- The electrons are filled in various energy levels in the order of their increasing energy. i.e.; the energy level with the lowest energy is filled first and so on. The energy level closest to the nucleus is filled first and the outermost level has the highest energy.
- The maximum number of electrons that can be accommodated in an energy level is given by the formula 2n2 where n= serial number of orbit and its value can be 1,2,…etc. Example: For first energy level or shell, n=1 and the maximum number of electrons that can be accommodated in it are 2 (1)2 i.e.; 2.
- New orbits are filled once the previous shells are completely filled. Sequential filling of orbits takes place. Example: Electronic configuration of Magnesium (Atomic number=12) is 2, 8, 2 instead of 2, 6, 4 because 2nd shell has to be fully filled before the next orbit begins to accommodate electrons.
- The outermost orbit or energy level can accommodate a maximum of 8 electrons.
Example:
The electronic configuration of Argon (Ar) is 2, 8, 8. The first and second energy level accommodates 2, 8 electrons respectively according to Bohr- Bury scheme.
According to point 3, the first and second shell is filled completely and then 3rd level is filled. i.e.; 2, 8, 8 and not 1, 8 as the 2nd level is fully filled without completely filling the first level.
According to point 4, the outermost level also has a maximum of 8 electrons.
Electronic configuration: Electronic configuration is the distribution of electrons in the various energy levels around the nucleus of an atom.
Two scientists Neils Bohr and Charles Bury gave some rules to distribute the electrons and called as Bohr-Bury scheme:
- The electrons are filled in various energy levels in the order of their increasing energy. i.e.; the energy level with the lowest energy is filled first and so on. The energy level closest to the nucleus is filled first and the outermost level has the highest energy.
- The maximum number of electrons that can be accommodated in an energy level is given by the formula 2n2 where n= serial number of orbit and its value can be 1,2,…etc. Example: For first energy level or shell, n=1 and the maximum number of electrons that can be accommodated in it are 2 (1)2 i.e.; 2.
- New orbits are filled once the previous shells are completely filled. Sequential filling of orbits takes place. Example: Electronic configuration of Magnesium (Atomic number=12) is 2, 8, 2 instead of 2, 6, 4 because 2nd shell has to be fully filled before the next orbit begins to accommodate electrons.
- The outermost orbit or energy level can accommodate a maximum of 8 electrons.
Example:
The electronic configuration of Argon (Ar) is 2, 8, 8. The first and second energy level accommodates 2, 8 electrons respectively according to Bohr- Bury scheme.
According to point 3, the first and second shell is filled completely and then 3rd level is filled. i.e.; 2, 8, 8 and not 1, 8 as the 2nd level is fully filled without completely filling the first level.
According to point 4, the outermost level also has a maximum of 8 electrons.
