According to aufbau principle why dont chromium and copper follow it.

1.	According to aufbau principle why dont chromium and copper follow it.
Answer» Thanks to you. You know what does 3d subshell dont contain 4 electrons.In actual configuration of Cr(chromium) 3d subshell is containing 5 electron Some elements do not follow the Aufbau principle, there are some alternate ways that electrons can arrange themselves that give these elements better stability.Explanation:Using the Aufbau principle, you would write the following electron configurationsCr = [Ar] 4s2 3d4Cu = [Ar] 4s2 3d9The actual electron configurations are:Cr = [Ar] 4s1 3d5Cu = [Ar] 4s1 3d10

Discussion