Question

1. What is the same about the valence electron-shell configuration of colored elements?

Answer 1

Colored Elements are actually know as d-block elements because of its d-d transition (which is actually a valence shell electrons ). All the d- black elements have same d orbital as its valence shell and electron present in that d- orbitals actually lead to the color for example Ni⁺² whose electronic configuration is [Ar] 4s⁰3d⁸ and color is light green , Co⁺² whose electronic configuration is [Ar] 4s0 3d6 and color is pink. From the example it is clear that the same about is its d- orbital as valence electron-shell and its d-d transition makes these colored elements.