Explain Bohr Bury rules for distribution of electrons into different shells. Write the distribution of electrons in sodium atom (Z = 11)


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Bohr Bury Rules :
(i) The maximum no. of electrons present in a shell is given by the formula In2 (where n is shell number).
(ii) The maximum number of electrons that can be accommodated outermost orbit is 8.
(iii) Electrons are not accommodated in a given shell, unless the inner shells are filled. Electronic configuration of Na = 2,8,1.