In what way is the electronic configuration of transition elements different from that of the non-transition elements ?

Explanation

Transition elements contain incompletely filled d-subshell, i.e., their electronic configuration is `(n-1)d^(1-10) ns^(1-2)` . Where as non-transition elements have no d-subshell or their subshell is completely filled and have `ns^(1-2)` or `ns^2 np^(1-6)` in their outermost shall.