" 37Fimd the enorgy of "5" th shell of "Be^(3+)" jon."

Derive the equation for radius of n th shell form Bohr theory.

If the kinetic energy of electron in n^( th ) shell of H - atom is K then its potential energy in n^(th ) shell will be

The total number of electrons present in 4^"th" shell of Bromine ( ._35Br ) are:

The total number of electrons present in 4^"th" shell of Iodine ( ._53I ) are:

How many Balmer lines in the spectrum will be observed when electrons return from 7^(th) shell to 2^(nd) shell ?