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^(0 - 2)` whereas non-transition elements have no-d subshell or their d-subshell is completely filled and have `ns^(1-2)` or `ns^(2) np^(1-6)` in their outer most shell.