Question

explain the Bohr- Bury scheme of redistribution of electrons in an atom​

Answer 1

To remove the drawbacks of Rutherford’s atomic model and to explain structure of
atom in detail Neils Bohr in 1912 proposed a model of atom. The special features of Bohr’s
model are given below:

i) An electron revolves in the orbit of atom with well-defined energy.
ii) Energy of orbits increases from inner shell to the outer shells i.e. energy for orbit nearest
the nucleus is lowest.
iii) If energy is supplied then electron moves from lower orbit ot the higher orbit and if an
electron jumps from higher orbit (energy level) to the lower orbit (energy level) then energy
is radiated as electromagnetic waves.
iv) Each orbit or shell represents an energy level. Such orbits are represented as
K,L,M,N,O……….. and named from centre to outwards.
v) The shell or orbits are associated with certain amount of energy and energy of
orbits/shells increases from inward to outwards.eg K<L<M<N.

Answer 2

Bohr-Bury rules :-

1) The maximum number of electrons present in a shell is given by an formula of 2n square.

2) The maximum number of electron that can be accommodated in outer most orbit in 8.

3) The electrons are not accommodated in a given shell, unless the inner shells are filled.