Question

What are transition elements. Write the electronic configuration of credit and cu

Answer 1

set of metallic elements occupying a central block in the periodic table are transition elements. 

cu-There are two main exceptions to electron configuration: chromium and copper. In these cases, a completely full or half full d sub-level is more stable than a partially filled d sub-level, so an electron from the 4s orbital is excited and rises to a 3d orbital.