you must be knowing that there are 2n2 electrons in any shell .
now each orbital can contain 2 electrons .
thus now of orbitals in nth shell is 2n2/2 = n2
The number of electronic subshells in the nth quantum level are
you must be knowing that there are 2n2 electrons in any shell .
now each orbital can contain 2 electrons .
thus now of orbitals in nth shell is 2n2/2 = n2