Electron Configuration of Cd

Cadmium (chemical symbol Cd) is a soft, silver-white metal that is found in group 12 of the periodic table. It is a member of the carbon group, which also includes zinc (Zn), mercury (Hg), and lead (Pb). 

The electron configuration of cadmium can be written as [Kr] 4d10 5s2. This means that the cadmium atom has 20 electrons in total. Ten of these are in the outermost shell, which is called the valence shell. The other 10 electrons are in the inner shells. 

The five electrons in the valence shell are in the orbitals d10, s2, …