In what way is the electronic configuration of the 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^(0-2)`, whereas non-transition elements have either no d-subshell or their d-subshell is completely filled and have `ns^(1-2)` or `ns^(2)np^(1-6)` in their outermost shell.