Question

The energy of an electron in k and l shell are same or different

Answer 1

definitely it will be different. for k shell n= 1 and for l shell n=2
total energy of an electron in nth orbit of an hydrogenic or hydrogen like atom is given by

$energy = 2.18 \times {10}^{ - 18}( {z}^{2} \div {n}^{2)joule}$